Timbuk2 Authority Custom 17 inch Laptop Backpacks, Eco Static Color:Eco Static The bottles feature a leak free ST271 3XL Black The bottles feature a leak free top for added spill protection The perfect everyday water bottle built for people on the go Wide mouth opening makes it easy to clean and add ice cubes Straw lid features an easy open flip top and has a leakproof design The Wide Mouth Bottle won't sweat or be hot to touch no matter the temperature of your drink 18 8 medical grade stainless steel doesn't transfer flavor or leave you with a metal aftertaste in your mouth BPA free and leak proof Thermo 3D ™ Double Wall Vacuum Insulation Technology Keeps your drink hot up to 12 hours and cold for 24 hours Compatible with most car and truck cup holders 20 oz Luggage pass through for attaching to your wheelie companion Reflective tape under compression straps Padded strap and back panel for extra comfort Airmesh ventilated back panel 100% recycled nylon from pre consumer materials