For quick hydration, the Flip Gulp's button activated, fully covered, high flow mouthpiece gets the job done. With its stylish, yet simple design, cleaning is easy since gunk has fewer parts and pieces to hide in. Soft-touch carrying loop folds so it can stowaway in your lunch bag, backpack, or cupboard. With Flip Gulp, mold never has an edge to cling to. Thoughtful design means less places for gunk to collect which means less cleaning for you. Dishwasher safe.