Ideal for quick hydration straight from your hand, pocket, waist belt, hydration vest or pack. The Ultra Flask 300 with large 42mm opening, lets you fill /re-fill quickly and easily with ice and drink mixes. It shrinks as you drink, minimizing water movement. Fits easily in most hydration vest, belt or backpack pockets. Beyond Lifetime Guarantee.

FEATURES

- Soft silicone, self sealing, high flow, easy to clean bite valve
- Modular and able to integrate within a variety of packs, vests, belts and pockets
- Collapsible

- Can be frozen or filled with hot water (max temp 60° C / 140° F)
- Large 42mm opening
- 100% BPA Free
- 100% PVC Free
- Dishwasher Safe, top shelf
- Exceeds FDA & EU regulations
- Naturally Anti-fungal
- Beyond Lifetime Guarantee


SPECS

- 300ml (10 oz) capacity
- Thermoplastic Polyurethane; Silicone; HDPE
- 42mm opening
- Dishwasher safe (top rack)/Freezer safe
- Weight: 32g (1.1 oz)
- Dimensions: 85mm L x 70mm W (3.3.5" L x 2.75" W)