Fill, kick back, enjoy, repeat. From morning coffee to campfire toasts, this multitasking tumbler makes lukewarm drinks a thing of the past. With its double-walled, vacuum insulated construction, it keeps drinks frosty for 8 hours, and piping hot for 4. The splash-proof lid features two openings: a small one for sipping and a wide one for chugging. The lid also snaps into place to stay out of your face while you drink.