 It's heavy duty. It helps you make joint gel so easily. You just shake it up. You could take it to go. You could use it for your whey protein. You can mix anything with it. It seals up nice and tight. You can take it in your car. Really cool free gift, yours to keep no matter what if you call today. Give us a call. Operators are standing by wherever you are in the country, ready to take your order and ship it right out. That phone number, 1-800-