ship from Japan Approximately 25% lighter than the same size (24oz, 32oz) ultra-lightweight HydroFlask(R) bottles The double-insulated walls are of tapered construction. Ultra-thin at the top for light weight and thicker toward the bottom for durability. Lightweight honeycomb structure insulation cap with perforated strap and aluminum pivot. In addition to preventing water leakage, further weight reduction is achieved. Category: Unisex Adult Year of release / model year: 2020