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Regularly: $0.29/Each

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Overall User Rating from 147 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.

Customer Reviews

  • Overall User Rating:

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

    4.9 stars from 147 reviews


    People Talk About:

    coupler Great tips couplers easy plastic standard Ateco pastry decorating

    Very inexpensive, yet absolutely invaluable! Great for switching out tips while frosting, but also for secure storage. Plastic wrap & a rubber band over the tip keeps it from drying out or leaking. The ridges help tremendously when you have butter(cream) fingers.

    Posted on

    Easily switch between pastry tips with couplers. They are a case decorators dream come true. Saves time and money by saving pastry bag usage and waste.

    from Sweet Pea's Cupcakery Cafe Posted on

    Ateco 400 2-Piece Standard Plastic Coupler (August Thomsen) since most of what we use to bake is rather small these attach to the smaller pastry tube and bags almost a vital need for us

    from PowerQuee Media Posted on

    These couplers are great! I bought several for an upcoming project but already own a few. They fit nicely with most piping tips, including Wilton's. The ease of switching from tip to tip is amazing when using these couplers!

    Posted on

    Love the Ateco 400 2-Piece Standard Plastic Coupler. I actually own many of these. Great value and makes decorating tip changes a breeze! Easy to clean too!!!

    Posted on

    I am not sure how I had never used Ateco couplers before, but I was very pleased to find out that they also fit the Wilton tips.

    Posted on

    This fits regular tips perfectly. My set came with one and now I have another. I will be buying even more. It's sturdier and washes well.

    Posted on

    These are starting to overtake my Wilton coupler collection. They are inexpensive and fit perfectly and are easier to wash in my opinion. Stocking up next time!

    Posted on

    The Ateco coupler is great because it makes decorating so easy! It holds everything in place so you don't have any messes to clean up. Great for a beginner who is just getting into cake decorating.

    Posted on

    I bought a ton of these for all my piping needs. It's so nice not to have to completely clean out the piping bags every time I need a new tip - especially when working with multiple colors.

    Posted on

    This product goes well with the Ateco 12" plastic pastry bags that we use for wrigting messages on our ice cream cakes at our parlor.

    from Reid's Ice Cream Parlor Posted on

    Does the job well - sturdy plastic, easy to use, exactly what you'd expect from a well-made coupler! This particular one is for small pastry tubes only, many of the tips I use require the medium or large coupler.

    Posted on

    Work with these on a daily basis and I'm very happy with them. Recommend them to anyone looking to purchase couplers. They are offered at a great price.

    from Gonzalez Bakery Posted on

    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

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