This 750ml stainless steel vacuum cup coffee tumbler features double wall insulation, preserving hot beverages for up to 6 hours and cold drinks for up to 8 hours. Made from BPA free, food grade 18/8 stainless steel, this tumbler preserves your drinks' original flavor and aroma, and a silicone sealing strip inside the lid provides an enhanced seal and prevents water leakage. An ideal addition to gift sets.