Minimal Stainless Steel Double Wall Insulated Water Flask Bottle - 17oz Yellow - 18/8 Stainless Steel Double Wall Vacuum Insulated with Copper Coating. All Metal Construction & BPA Free With its double-wall vacuum insulation technology, beverages remain hot up to 12 Hours, and cold up to 24 Hours 1.75" large mouth for ice cubes, leak proof design, condemnation free making it easy to go wherever you do Made of 18/8 stainless steel food-grade stainless steel and non-toxic BPA-free materials The compact slim body fits in most cup holders and side pockets on your back packs The large soft touch handle on the metal cap make it comfortable in hand