One-piece leak-proof lid that allows for quick and easy cleaning while preventing leaks. Lid easily snaps up for drinking and then simply push it closed when you’ve finished in order to seal. This Thermalock™ vacuum-insulated travel mug has a comfortable grip that provides convenient one-handed drinking for both left- and right-handed users. The mug also fits most car cup-holders as well as most single-serve brewers. It also features a dishwasher-safe lid for easy cleaning.