Features1Made from TPU material, BPA-free, tasteless, odor-resistant and reliable. 2Soft silicone bite for quick hydration, with a dust cap to keep clean. 3Wide opening for easy refilling. 4Extension tube for easy drinking. 5Folds compactly when empty, easy to store in your pocket or hydration backpack. 6Suitable for Cycle, climbing, backpacking, jogging, running, hiking, traveling, marathon, etc.SpecificationFeatures:Made from TPU material, BPA-free, tasteless, odor-resistant and reliable. Soft silicone bite for quick hydration, with a dust cap to keep clean. Wide opening for easy refilling. Extension tube for easy drinking. Folds compactly when empty, easy to store in your pocket or hydration backpack. Suitable for Cycle, climbing, backpacking, jogging, running, hiking, traveling, marathon, etc. Specifications:Material: TPU Color: Blue / Transparent (optional) Capacity: 500ml Size: 7.5 * 18.2cm / 3 * 7.2in Tube Length: 16.5cm / 6.5in Unit Weight: 45g / 1.6oz Package List:2 * Soft Flask with Extension TubePackage List2 * Soft Flask with Extension Tube