Welcome to utility and design in harmony. Essential equipment for every adventurer, the Stash flattens for maximum room in your pack. Expands for use on the trail. It's compact, flexible and 50% lighter than a hard bottle. Construction with purpose. Twist to collapse down to 1/4 of its filled size when empty, minimizing the space it takes up in your pack At 50% lighter than most hard bottles it's the most compact and convenient water bottle solution The flexible walls, TPU carry handle & grip ring create a comfortable carrying experience External capacity gauge allows you to track your hydration intake or measure out the contents The 42mm mouth screw cap makes it quick and easy to fill Rigid top and bottom keeps it sturdy and easy to drink out of Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity Can be frozen or filled with hot water (max temp 60Adeg C / 140Adeg F) Safe and reliable, 100% BPA & PVC free Specifications Capacity: 1 L / 32 fl oz Weight: 107 g / 3.7 oz Dimensions: Open - 210 mm / 8.2 in x 100 mm / 3.9 in Closed - 60 mm / 2.3 in x 100 mm / 3.9 in Material: Thermoplastic Polyurethane; HDPE