Description: MATERIAL: TPU. Our soft flasks is 100% BPA and PVC free tasteless eco-friendly durable lightweight with good toughness, great for running hydration vest SAVE SPACE: The collapsible water bottle is foldable and can be fold into a compact size (about 6 cm high). Such a space-saving soft water flask is mini potable convenient for your backpack pocket easy carry EASY POUR & DRINK: With wide neck design, it’s convenient to pour water into the soft flask water bottle. When you want to drink water, just nibble the groove of the valve or use a straw directly without taking your running backpack off or stopping your running steps OCCASION: The handheld water bottle is design for outdoor sports and daily life use. This sports gel flask is perfect for hydration, for marathon, jogging, running, hiking, cycling, climbing, backpacking, traveling, travel, jog, run etc FEATURE: The soft flask speed straw is hand held, for ultra-light weight, anti, soft, small mini size, compact, easy carry, practical, simple to operate for children kids taking water to school or adult runner jogger use Specification: 450ml:27x8.8cm/10.63x3.46 inch 420ml:23x7cm/9.06x2.76 inch 250ml:19x6cm/7.48x2.36 inch 500ml:20x8cm/7.87x3.15 inch Package Includes: 1 Piece Soft Flask Water Bottle