Keep Drinks Hot or Cold for Hours: Double-wall vacuum insulation maintains the ideal temperature, keeping drinks warm for up to 6 hours or cold for 12. Whether it&&';;s your morning coffee or a refreshing iced tea, enjoy it just the way you like it. Pure Taste, Every Sip: Crafted with an ultra-dense 316L stainless steel interior, the tumbler resists odors and metallic aftertastes-preserving the original flavor of coffee, tea, or infusions. Every sip is clean, fresh, and true to taste. Made for Life on the Move: Compact and lightweight, the OutIn Travel Tumbler fits seamlessly into your everyday carry. Perfect for your commute, outdoor adventures, or simply staying hydrated at your desk. Durable and Safe: The 316L stainless steel interior resists corrosion and scratches, ensuring worry-free sipping every time. *Under test conditions of 26AdegC (78.8AdegF) room temperature, the Travel Tumbler maintained water at an initial 95.5AdegC (203.9AdegF) for six hours, with a final recorded temperature of approximately 44AdegC (111.2AdegF). *Please Note: Travel Tumbler is NOT recommended for use in dishwashers or microwaves.