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Regularly: $0.29/Each

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Overall User Rating from 134 reviews

  • Eliminates the need to empty your decorating bag before changing tips
  • Made of durable, white plastic
  • Securely fastens pastry tip (sold separately) in place
  • Ideal for bakeries and cafes
  • Ridged sides along ring for easy assembly
  • Perfect for commonly sized pastry tubes

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You May Also Need

"You May Also Need" items are guaranteed to work with the item you are viewing, such as lids that will fit a cup or casters that will fit a piece of equipment. If an item is not listed in this section, we do not guarantee that it will work with the product you are viewing and do not recommend that you purchase them for use together.

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.

Color White
Material Plastic
Shape Round
Size Standard
Type Couplers


This Ateco 400 white, standard coupler allows you to interchange standard sized tubes and small tubes without emptying the contents of your decorating bag to save time and labor. In addition, ridged edges on the ring allow you to easily assemble the coupler to the base with minimal effort. Ideal for bakeries, cake decorators, coffee shops, and anywhere else you need to decorate baked goods, this plastic coupler will get the job done!

Bringing you innovation and quality for over 100 years, Ateco, an August Thomsen brand, has been internationally known in the industry for creating baking tools of superior craftsmanship and design. By continually improving on tools, materials, and packaging, Ateco is dedicated to providing professional bakers with the kitchen essentials they need to succeed in an ever-evolving industry!

Overall Dimensions:
Top Diameter: 1/2"
Bottom Diameter: 1''
Height: 1 3/16''

Pastry Tube Chart Pastry Tube Chart

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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.

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Customer Reviews

  • Overall User Rating:

    Ateco 400 2-Piece Standard Plastic Coupler (August Thomsen)

    4.9 stars from 134 reviews


    People Talk About:

    coupler GREAT tips couplers easy Standard Ateco pastry bags decorating

    I've ordered several of there couplers. They are a cake decorators staple. I strongly prefer these over the couplers that have a notch because you are able to use these to make border/dots as well.

    from That Cake Place Posted on

    Best invention for decorating. This little gadget makes icing with multiple tips easy without the hassle of changing bags for each tips. I bought a few and will re-order more.

    from Kim Posted on


    Posted on

    good standard plastic coupler fits well into the 399 pastry tube covers and the paltry bag. Still need to buy the tip to used along with this.

    from BottleOpener Posted on

    Fits great into the 16" plastic pastry bag sold by the same company #3316. I replaced out entire collection of bags, tips and rings for the summer season without breaking the budget.

    Posted on

    These couplers are pretty good. They fit all of my decorating tips from different brands. I like the material they are made out of better than other brands.

    from Blissful Bake Shop Posted on

    I know this is just a standard coupler but I am particular and I can't be more exicted to find a standard coupler that has a perfectly round opening without any extra small opening on its side, like what we commonly see in Wilton's coupler. This means, I can use just this coupler without having to attach a plain tip just to pipe a circle shape. I don't know about you but one less item to wash after you're done decorating is great for me.

    Posted on

    Great plastic coupler, holds our tips perfectly in place and makes changing tips easy. Our dies in the frosting do not appear to affect or stain them. For a plastic coupler it is holding up very nicely. Great buy.

    from Russ' Sub Shack Posted on

    Ateco 400 Standard Plastic Coupler (August Thomsen) are your standard coupler that last. I definitely recommend this product for use in all your pastry bags.

    from hermans bakery inc Posted on

    Great for switching out tips on the fly. No more emptying out bags. Really a necessity if you're doing any amount of piping on a commercial scale.

    from Mike's Mindful Plate Posted on

    These couplers work great for the most part! I have found when mixing it with Wilton products, they sometime leak. So try to keep the Ateco sets together.

    from Sweet Treats Bakery Posted on

    Love these! Very hardy and easier to work with then typical store bought. There is no notch either, so this makes it easy to use just the tip for decorating too!

    from The One Butt Bakery Posted on

    Ateco 400 Standard Plastic Couplers are essential for decorating cakes and such. They hold your tip tightly and in place. They are easy to clean as well.

    from Ruffled Feathers Posted on

    The more complicated my cakes are with lots of colors the more couplers I need. These are comparable to the brand at my nearby craft store at a lower cost! Very satisfied with my purchase.

    Posted on

    This coupler is actually really great for the price. It's much better quality than my Wilton couplers, even though I paid much more for them. Great buy

    Posted on

    It is as expected, a standard size coupler for your pastry bag. I find the Ateco couplers last me longer than the Wilton, and this was half the price of buying the same item at the local supply.

    Posted on

    I'm so happy for this couplers. It's easy to play with different tips and not change the pastry bag. This is great product and good price.

    Posted on

    I bought these to use with the disposable pastry bags. Easy to use, and very cheap to purchase. They are much more in the local stores.

    Posted on

    I purchased 2 along with pastry bags, didn't know that there is an additional piece needed. I could be wrong. Thus, have not used yet. If you have everything, should be fine.

    Posted on

    The convenience of this product for the price is a must for even the most novice decorator. This wash up nicely in a cage on the top rack of my dishwasher.

    Posted on

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