Manufactured by Nasco, accept no substitute for the original Whirl-Pak bag. Offered in a wide array of sizes to fit almost any application. Ideal for sample collection of powders or dry products as well as liquids or semi-solids. Comes with handy write-on label for easy identification or plain without label space. Sterile and disposable these are the most economical containers when collecting or storing samples. Safe, spill-proof, with wide openings for quick filling and dispensing. Packaged in quantities for every need.