Designed to fit in little hands and cup holders, our large, soft zippers are easy for little fingers to open and close. And you can rest easy knowing they won't leach harmful chemicals like plastics can. Better for Baby If you like leached chemicals in your baby's snacks, this product is not for you. Better for the Planet Zip Top was designed with the environment in mind. One Zip Top can replace 5000+ disposable bags. That's a lot of trash. Save your snacks and save the planet. The fish will thank you for it. So Much Better Zip Top baby snack containers stand up, stay open and ship shut.