The Ultra Flexi Flask 350ml Straw is a soft, collapsible flask that compresses as you drink, cutting out the sloshing and bouncing weight that a rigid bottle carries in a pack or vest. Durable TPU construction gives it a secure, textured grip even with wet hands, while a wide opening makes refilling or cleaning at a tap or stream quick work. The built-in straw puts water within easy reach without tipping your head back, and the interchangeable bite valve keeps things spill-proof in storage. At just 50g empty, it slots into any running or hiking setup without adding real weight, whether it's your main water source or a backup for electrolytes.

Features

• Durable TPU construction with a textured grip.
• Compresses in volume as you drink, reducing sloshing.
• Built-in straw for hands-free, head-up drinking.
• Wide opening for easy filling and cleaning.
• Interchangeable straw and bite valve.
• BPA, PVC and phthalate free.

Specifications