LOVOUS Double Walled Stainless Steel Vacuum Insulated Water Bottle, 17 Oz, BPA Free, Keeps Drinks Hot for 12 Hours and Cold for 24 Stylish vacuum flask constructed with precision double walled insulated technology with leakproof and shakeproof advantages. High-quality vacuum insulated Double wall stainless steel water bottle with copper plated vacuum insulation; BPA and phthalates free; no metallic taste,Keeps Drinks Hot for 12 Hours and Cold for 24. Crafted from food grade stainless steel and, unlike plastic water bottles, contains absolutely no hazardous BPAs whatsoever. We use only the highest-quality food-grade stainless steel. Interior is made of rust-resistant stainless steel #304, and exterior is made of durable stainless steel #201. High quality construction that should give you years of use. Easy to clean, fill, and drink from. Even filled with ice, the bottle will not sweat.