Built for the long haul. The Endurance Bottle is a 25oz insulated stainless steel water bottle made for trail miles, gym sets, summit pushes, and Tuesday-afternoon hydration alike. The twist-on lid pairs a screw cap with a carry loop — spill-proof, leak-proof, and easy to clip to a pack. Choose an antimicrobial solid or pattern with patented SiSA™ coating, or grab a sassy saying (no SiSA — just attitude). Double-wall vacuum insulation keeps drinks cold for up to 36 hours or hot for 8, and the BPA-free build means you can refill all day with zero guilt.