Wilton has an amazing line of tools for decorating cakes to showcase special events or holidays, cookies, cake pops and so much more. So whether you are decorating for a snack, just for fun or something special, check out this line of helpful tools. Cake Decorating Coupler Large- Standard coupler fits all decorating bags and standard tips. Use large coupler with large decorating tips and 14" to 18" Featherweight Bags.