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Regularly: $0.29/Each

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  • Eliminates the need to empty your decorating bag before changing tips
  • Made of white plastic
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79 reviews
MFR Item:
How to Pipe a Rose with Buttercream Frosting

How to Pipe a Rose with Buttercream Frosting

Use these simple steps to professionally add a buttercream rose. You'll need a spatula, rose tips, a leaf tip, couplers, a flower nail, a rubber spatula, and piping bags. Begin by squeezing cream onto the flower nail in a circular motion, creating a lump with a tip on it. To create the layers of a rose, squeeze cream in an short arch motion and continue rotating the rose until you have the desired amount of layers, or petals.

Copy and paste the embed code above.

Ever wonder how to professionally decorate your cake? Watch this short video and learn how to style up your next cake with a classic buttercream rose.


This Ateco (August Thomsen) 400 standard plastic coupler allows you to interchange standard sized tubes and small tubes without emptying the contents of your decorating bag. Ideal for bakeries, cake decorators, coffee shops, and anywhere else you need to decorate food items quickly with minimal mess, this white plastic coupler will get the job done!

This coupler is compatible with Ateco's 783 55-piece stainless steel pastry tube decorating set (August Thomsen), as well as small-opening reusable bags and all disposable bags.

Please note: All reusable bags, except canvas bags with seams, can be cut to fit different tips and couplers. These size recommendations are based off measurements prior to cutting.

Compatible Models

This item is compatible with the listed models, according to the manufacturer. We do our best to keep this listing as accurate and up-to-date as possible. If you have any questions or concerns, feel free to contact a Customer Solutions Specialist before placing your order.


Pastry Tube Chart Pastry Tube Chart

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Customer Reviews

Overall User Rating: Ateco 400 Standard Plastic Coupler ( 4.8 stars from 79 reviews )

    These are really good quality couplers for icing bags. I actually like them better than the Wilton ones, which Is really the only ones available locally. Will continue to order these.

    from Everything Iced Cupcakes & More Posted on

    I love these couplers. They make it so very easy to complete a project with one pastry bag (per color). My only regret is that I didn't order more of these (I will!). These fit the smaller Ateco pastry tips just perfectly.

    Posted on

    Nice coupler and it works with some of my tips that I currently have. I am waiting on the bag to air out so I can test both together.

    from Local Foods Bakery Posted on

    This coupler fits a large portion of my generic tip. However the addition of medium size would cover 90% of the tip sizes. Great and extremely durable. I would buy more than one for my decorating task.

    from The Travels Inc Posted on

    There's not too much to be said about this coupler other than to say that it fits a standard sized (10") pastry bag nicely and seals very tightly. The plastic it's made out of is of high quality and can be thrown into the dishwasher in the utensil basket. The screw thread is smooth and tight while easy to unscrew when finished.

    from Home Use Posted on

    These are the best couplers I've ever used! I've been using them for so long yet they still look new! They don't break easily and they're easy to clean.

    from Rosys Cakes LLC Posted on

    Everyone needs a sack full of these they hold up to being opened and closed all day long. I've used other brands in the past only to have the rings break after a few uses these are durable!

    from Sally's Piece-a-Cake Posted on

    This coupler guys tightly on pastry bag and holds up well. The plastic is stronger than others I have used which cracked over time. Love them!

    from Home Grown Cakes Posted on

    I purchased these to try in comparison to the Wilton couplers, these are better in my opinion, they are a little slimmer and they wash up easier afterwards. I will definitely be purchase more of these in the future!

    Posted on

    These couplers work very well. I have used them when frosting my cupcake orders. After soaking in soapy warm water, they clean up very well. I plan to purchase more in the near future!

    Posted on

    Purchased this set for a great price and I use them all the time they are great when you have to switch tips for decorating and writing on cakes.

    from stellas custom cakes Posted on

    This coupler works well to secure tips. It slips in and out of the decorating bag easily. I have even used it without a tip when I want a plain, smooth edge pattern.

    Posted on

    These couplers fit my disposable and reusable piping bags well. I can easily toss these in the dishwasher as long as they are in the silverware tray.

    from 8 Bit Bakeshop Posted on

    Works as it should - simple coupler, should last a long time - keep em organized and you should be good to decorate for years to come!

    from Mountain Oven, LLC Posted on

    I use these couplers all the time when I am decorating with royal icing and buttercream. These are for finer decorating projects since it is for smaller tips. These are ideal for being able to switch tips with the same kind of icing, so that you don't have to fill a whole new bag if you want to use a different tip. I also like how it enables you to keep your bag more stable, hence, make neater lines when decorating.

    Posted on

    Makes it easy to change smaller tips when using a pastry bag for different decorations, i.e. cupcakes and cakes; easy to clean and fits the bags and tips well

    from Home Posted on

    These are probably the best quality couplers I've ever owned. I cannot even begin to explain how many bad couplers I've used only to realize it when its to late and the icing is seeping through between the coupler and the pastry tip all over a cake. These do not leak and work perfectly.

    Posted on

    these standard size couplers are the right size to use with the wilton tips (smallest ones) great price, am gonna order a dozen next time!

    Posted on

    Works great! Good, quality plastic. I use these with featherweight and sometimes Wilton disposable bags. They thread very well (PME and Wilton tips, too). *These fit with Ateco Tube Covers.

    from The Ruffled Apron Posted on

    Very sturdy compared to other brands on the market. Fits Ateco tips very tight, with no worries about a "blow out", while piping. I purchased multiples to have on hand, because Ateco products are such great quality.

    Posted on

    If you're into decorating, having a coupler makes the job smoother as you don't need to change out the entire bag to switch tips. Simply insert the coupler in the bag, add your buttercream and attach your decorating tip. When you want a new design, switch to a new tip. Simple.

    Posted on

    These are sturdy, inexpensive and clean up easily. You can never have enough of these couplers around. Buy a bunch! You'll be glad you did!

    from Bakers Buzzin' LLC Posted on

    I had a really big event coming up and started back practicing cookie decorating. Needless to say I needed some couplers. Super easy to use and makes switching between tips a whole lot simpler. Fewer bags and paper cones needed.

    from Greene Girl Pastry Posted on

    The ateco products are by far the best in baking! The coupler is super user friendly even for new bakers. I look forward to trying out all of the different tips!

    Posted on

    I make a LOT of cakes for family and friends and these were so much more affordable than going to my local store to buy. I just couldn't pass them up. Same quality as higher end ones that I have used in the past. Will definitely be ordering here again!

    Posted on

    These are the best couplers, and the price is unbeatable. I have both Ateco and Wilton couplers, and I reach for the Ateco every time. They work with my Wilton, Ateco, and PME tips. Excellent product, excellent value.

    Posted on

    Excellent price to have more of these on hand for our growing cake business - thanks Webstaurant for affordable pricing even for us small businesses :)

    Posted on

    This is a excited tool. Low price High quality, It's better than Wilton. The plastic is thick, Convenient Cleaning. it helps you to change tips easy.

    from Phoebe Posted on

    The standard coupler set worked well for all of my brands for tips as well as for the Ateco brand. I would recommend to others.

    Posted on

    I bought several of these couplers so I would have some spare ones. They are a bargain and they work well. I use them with the Ateco 4712 - 12" Disposable Pastry Bags and they are a perfect fit.

    Posted on

    These fit the Ateco disposable bags perfectly.

    Nice couplers, it was time to replace my old beat up ones. What a joy. These are top quality and wash up nice in the dishwasher. Highly recommended!

    Posted on

    i have order 5 pieces of ateco standard couplers as they comes in very handy when we are decoratingwith different co;ours.. they are very good in quality

    Posted on

    The price of this coupler is outstanding and it works fantastic. It makes changing frosting tips out so easy. If I am using more than one color frosting, I prepare the frosting in disposable bags and switch them out simply dropping them into the pastry bag with the coupler already assembled.

    Posted on

    When you lots of frosting/icing work you need lots of couplers for sure as well. Ateco is the brand we use for our pastry needs. They compliment our other Ateco stuff very well.

    Posted on

    These couplers are great !!! durable material, easy to work with, easy clean up, fits the icing bag and icing tips and great price.. I would reccommend !!!

    Posted on

    Best bang for the buck and good Ateco quality, better than the bigger brand. It's hard finding small sized couplers where I live so these saved me.

    Posted on

    These are awesome couplers, they fit my Wilton tips and work well with the piping bags I also ordered from this site. the price is amazing!

    from Cakes by Ashley Posted on

    The Ateco 400 Standard Coupler fits most of my tips (obviously not the larger ones) and keeps them in place. It also fits inside the decorating bags sold on this site. Good buy!

    Posted on

    Fits perfectly with the cover also sold on Webstaurant

    The Ateco 400 standard plastic coupler makes working with larger projects on cakes easy. The coupler makes it easy to change out the tips and use different tips with the same color icings.

    from My Sweet Escape Posted on

    Great Price for a great product,, better to order a few xtra just in case,, the low price makes it easy to do just that!!!!

    Posted on

    Very nice couplers I have a lot of them now. Much better than ones I've gotten at local bakery stores. They fit bags nice with no leaking.

    from Countryside Cakes Posted on

    The Ateco 400 Standard Coupler is great when using a pastry bag and needing to switch tips. I would recommend this coupler to anyone. It does the job and is a fantastic price.

    Posted on

    These couplers are wonderful for decorating cakes and cookies! They allow me to change decorating tips so easily to make different shapes and styles with different colored-frosting. I love them!

    Posted on

    These couplers are great! They are much sturdier and far less expensive than the ones I use to purchase at the craft stores. I love that they are so inexpensive, because it allows them to be disposable when I get too lazy to fish it out of the piping bag when I am finished decorating.

    from Cakes by Leece Posted on

    Ateco 400 Couplers

    I have only ever bought the craft store couplers and these are by far superior they are sturdy and the coupler screws on snug. I never have to worry about it popping off! Will be buying more=) these are also less then half price the craft store version!

    from Simply Sweet Posted on

    When we ordered these we hoped they were the quality we expected. They are just like the other couplers that are much more expensive. We recommend these couplers.

    from J & B Baking LLC Posted on

    So far these work great in my bags, no more trying to line them up and then going on crooked. This are amazing couplers to use for my decorating.

    from Sweet Southern Cookies Posted on

    Great standard coupler- Fits the tips I needed it to fit and works great with standard pastry bags- great price and quick shipping as well!

    from Dailey Enterprises Posted on

    A friend of mine gave me these couplers. They were a Better quality then the ones I bought at Michaels for a lot more money. I now know where (webstaurant) and what brand (Ateco) to buy.

    from Anna Mea's Bakery Posted on

    We love the Ateco Couplers because we do not have to waste bags of frostings just to change the tips. We have had good luck with these couplers not changing colors as well.

    from Fix it with Frosting Posted on

    i purchased this item separate from the bags since they are not included with the icing/filling bags. For the price these are a great value.

    from Oak Hill Bulk Foods, Inc. Posted on

    This coupler is great, nice and sturdy for preparing frosting filled pastry bags, which is what I needed it for. A good buy for bakers.

    from New Era Services Posted on

    Great coupler which seems to me to be better maid than the wilton ones you get at the craft shops. Feels more secure when tighten than the wilton ones I already have.

    Posted on

    These are great little couplers. They work great - WHEN they fit the tips and bags you have. Unfortunately, there are a variety of tip sizes, coupler sizes, and bag sizes, with very little information to direct you to the appropriate matching sizes. (at least nothing I could find). Admittedly, I'm new to this, so had no idea they weren't all interchangeable, so now I have 3 different sizes of bits, 2 different sizes of couplers, and 2 different sizes of bags and liners. This "standard" size appears to be the smallest size, but does not fit all tips - even if they look like they will. SUGGESTION to the site: PLease list the sizes as Small, Medium, or Large, along with all the matching bags, liners, and tips, so we can tell at a glance what goes with what. (I've placed two orders to get it right, but still have tips I can't use.)

    Posted on

    Thanks for your review! We agree that you should be able to clearly know which items work together. We are working to update our content so that you may better find the items you need.

    WEBstaurantStore.com Customer Solutions

    Good Product at a great price. I buy a lot of these and am always happy to have extras on hand. These are must haves

    from Holiday Inn Posted on

    never hunt for the right size coupler again. this site has them all. large, medium and small. you can bu several at these great prices

    Posted on

    I am excited to find such an outstanding price for couplers. I have seen them offered for almost 10 times as much on other sites. Having a good supply of couplers helps us use decorating time efficiently.

    from Mimi Posted on

    These couplers are worth buying in bulk. I always use them in my "color" buttercream bags to change tips for writing on birthday cakes that customers buy from our case. The coupler alone without a tip also is great for filling a cannoli or cream puff.

    from Baked By Dan Posted on

    Great coupler and super inexpensive! Get a couple and it makes frosting and decorating go by so much faster. I wish I had gotten more the first time around.

    Posted on

    These are great couplers. I made the mistake of only getting one - so am ordering several more now. These grip the pastry bag well and keep the decorating tip taut on the end without wobbling. I'm ordering more so I can load up several pastry bags with different batters and tips at one time from now on.

    Posted on

    Coupler holds decorating tubes (standard size) to pastry bags perfectly without leaking. Ready to pipe buttercream!

    Great Little Item to have and very cheap as well!. They work amazingly keeping the tips on the piping bag while you are trying to decorate. Great product to have!

    Posted on

    These couplers are perfect and priced well to have plenty on-hand for my business. They fit any decorating bags and work with all types of tips. Easy clean-up.

    from Those Nut-Free Ladies Posted on

    These are so economical. I am constantly fishing pieces of couplers out of my garbage disposal - now I have plenty to spare for my next project!

    Posted on

    Ateco stamdard coupler is a good product. These a very large coupler and works great with large decorating tips. Happy with my purchase and will order more.

    Posted on

    The Ateco 400 Standard Coupler. It is great to have several of these,because it allows you to have several tubes of icing ready to go.Meats all your decorating needs. Thanks.

    from Harrison Familey Restaurant Posted on

    I've spent a lot of money on the "other brand" that you find at your local hobby stores- and these are a third of the price, and there is no difference. Save your money and get these!

    Posted on

    These are the most affordable couplers I have found. I've overpaid for just one before at a bakery supply shop. I will never over pay for couplers again. I use these so much, so multiples are a must.

    from Home Maker Posted on

    This coupler is a basic coupler but does the job while using a frosting bag. You can never have enough of these. I recommend this product.

    from Tristan's Posted on

    We seem to go through these like crazy in our store, but Ateco couplers have lasted the longest! Great product and very affordable. Easy to clean and hold up nicely!

    from Breads, Buns, n' More! Posted on

    A great standard coupler at a great price. I'd recommend getting multiples of this coupler so you can work with several bags of frosting at once.

    Posted on

    I love my Ateco couplers. They are the best. They never leak and I use them over and over and they stay in good shape.

    Posted on

    Awesome price and value. Another indispensable bakery item. We use these every single day and have over 100 of them in the shop. These are great for piping cupcakes if you screw the top assembly off instead of using a large round open tiep.

    from Sweet Spot Posted on

    This is a great standard coupler! Fits standard tips! Creates a super tight seal! Makes icing cupcakes a whole lot easier! Very inexpensive price that makes it easy to buy several!!

    Posted on

    Really great couplers. These create a tight seal, ensuring that your icing/batter/etc remains inside the bag, and doesn't squeeze out, while securing your tip in such a way that gives you the best control. Perfect!

    from Carnegie Mellon University Posted on

    These are the perfect couplers to complement my other Ateco cake decorating sets that I have. This size fits most of the tubes and inserts that we use.

    Posted on

    Of course this is a "gotta have" with the bags and tips. Without your online website I would not be able to work on my pastry skills

    Posted on

    This coupler is great because it works with the standard pastry tips that I use. I am able to frost my mini cupcakes and they look great!

    from Intoxicating Confections Inc. Posted on

    I bought these couplers without knowing what size I needed for my Wilton tips and it turns out that these are a perfect match. they are durable and handy.

    Posted on

    i bought three

    this is the best item to have when u like using baking tips! it allows you to easily change the shape and number of your tip without undoing all your frosing in your pastry bag!

    Posted on

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