1000 pcs 12 inch disposable piping bags, enough for your daily use (tips and couplers not included). Disposable Pastry bags are made of sturdy, safe plastic that is explosion-proof and thick enough to withstand the pressure of your squeezing icing without bursting or leaking easily. NON-SLIP: Our icing piping bags have a textured surface that provides better grip and a better feel for use, making it easy to squeeze cream frosting out of the bag. Usage: Cake decorating bags are ideal for squeezing frosting, chocolate, and buttercream frosting to decorate cakes, macarons, cookies, cupcakes and pastries, adding fine details to your desserts