Retains Temperature For Up To 8 Hours: Vacuum-seal technology and double-wall construction ensure superior insulation for hot or cold liquids. Truly Leakproof: Will not leak! The only mug with a vertical lid lock.
Ensures no accidental spills and allows for convenient 1-hand operation. Safe & Nontoxic: BPA-free lid and food-grade stainless steel mean there are no chemicals that can leech into contents.