Kee-Seal Disposable Piping Bag made from polyethylene. It offers HACCP International approved, double sealed seam for superior strength and durability, perfect angle between bag and nozzle. Use this handy piping bag 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.