A single Disposable Piping Bag
A piping bag is a kitchen tool used for decorating cakes, pies, cookies, and other pastries, and also for squeezing doughs, batters, creams and puréed ingredients like potatoes onto platters or baking sheets.
A piping bag is basically a bag in the shape of a cone. The bag is filled with the ingredient to be piped and then twisted to force the ingredient toward the pointy end of the cone. The pointy end is open and can be fitted with any number of tips which will produce a different decorative effect.