One-handed self-sealing lever. Leak-proof closure. Lock-open button for frequent sipping. Arms flip up for easy cleaning. Vacuum insulation stays hot 4+ hours. Impact cap. Total capacity: 16 oz / 473 ml. Total weight: 12.54 oz / 355 g. Dimensions: 8.85 X 4.13 in / 22.47 X 10.5 cm. Warranty: Got Your Bak Lifetime Guarantee. Bottle material: stainless steel.