Lifestraw Peak Series Squeeze 650mlBackcountry versatility for trail running, through hiking and limited space adventures! Protects against bacteria, parasites, microplastics, silt, sand, and cloudiness Ultra compact, our reconfigured filter is tiny but mighty with a super packable kit that doesnt sacrifice weight or space Extreme durability: 2x thicker, premium materials make it tougher and ultra leak proof Highly versatile means the collapsible squeeze bottle system is designed with