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.

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, PVC Free
• Dishwasher Safe, top shelf
• Exceeds FDA & EU regulations
• Naturally Anti-fungal
• 42mm opening
• Dishwasher safe (top rack)/Freezer safe

Weight: 32 g
Capacity: 300 ml
Dimensions: 85 x 70mm