Leak-proof sureseal flip cap, screw-on lid and loop top, easy to Use with just a simple push of the bottomBPA- and phthalate-free, carry loop top, ergonomic flip cap, secure screw-on lidPerfect for protein shakes, smoothies, pancake batter, and more, use as a mixer, drinking cup100 percent food grade material the most safe and healthy material for bottles which is BPA free