AVOIN colorlife Double Walled Vacuum Insulated Stainless Steel Sport Water Bottle(Many Colour Option)-BPA Free 100% pure High-quality food grade 18/304 stainless steel on both inside AND outside walls - Non-leaching & toxin-free Unique double-walled vacuum insulation technology with vacuum-seal cap keeps your drinks cold for 12hrs, hot for up to 24 hours Wide drip-free mouth opening for ice cube insertion(mouth:3.6cm) and easy drinking - Perfect for hiking, camping, sports and everyday use Fashion design,looks cool - you will love it yourself and want to gift it to family/friends with free gift box Durable & Dependable - Rust-proof and leak-proof