- Ideal for lightweight hydration to keep you going further - Fits most backcountry hydration filters - Durable 18/8 Pro-Grade Stainless Steel construction - TempShield™ insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours - Flexible perforated strap and aluminum pivots for added weight loss - BPA-Free and Phthalate-Free - Compatible with our Wide Mouth Straw Lid