Delivers 25% more water with every sip. Featuring Quick Link Hydrolock for easy one-handed on/off water flow. Hydroguard technology that inhibits growth of bacteria. Insulated tube cover maintains water temperature and protects tube from UV rays. Angled Exit Port to optimize the attachment of in-line purifiers and accessories. Self-sealing bite valve. Ergonomic fill handle for comfortable easy filling. BPA, BPS & BPF free. 50 oz./1.5 Liter.