Double-wall vacuum insulation keeps drinks cold for 7 hours or iced for 35 hours in this half-gallon tumbler that's perfect for athlets or adventurers.What it does: A rotating handle, ergonomic design, built-in flip straw and leakproof lid make it a win-win no matter where you take it.Additional features: The rugged handle and built-in fence hook provide portability and convenience. Sizing information: 2 lb.; 5.5"L x 5.8"W x 9.7"H; holds 64 oz.