Item:WRELS Soft flask Material:TPU Capacity:150ml/250ml / 500ml Weight: 25g /27g / 33g Standard:US FDA 21 CFR 177.1350 Features:Folding,lightweight and BPA free Application:climbing/hiking/cycling/running Features: -Flask compresses as you drink to eliminate water sloshing around inside it -Updated soft bite valve with higher flow rate, easy on the teeth -Slim and lightweight, fills easily with wide mouth opening -Durable Thermoplastic Polyurethane TPU construction -BPA, PVC and Phthalate free, will not taint taste; Meets or exceeds FDA and EC regulation - Hydration vest compatible: fits easily in most hydration vest, belt or pack pockets. Soft material conforms to any pocket for a comfortable carrying. -Reliable and safe:100% BPA & PVC free. Wide working temperature range