Features: Large mouth opening allows you to fill the flask easily with ice and makes cleaning easy Hypalon reinforced handle for easy transporting Packable empty reservoir collapses and folds to fit in most pockets HydroGuard™ Technology inhibits the growth of bacteria in the reservoir and tube 100% BPA, BPS, and BPF free Big Bite™ Valve delivers 20% more water per sip On/Off lever makes it easy to prevent leaks QuickLink™ system for easy reservoir removal from your pack Compatible with on-bike frame packs Compatible with LifeStraw® Capacity: 2L