MY&LY? Portable Leakproof Non-explosion Glass Water Bottle with Nylon Sleeve&iexcl;&shy; Heat insulation, Portable and leak proof-- The bottle has a nylon sleeve, which is heat insulation. The Nylon sleeve has a loop, which is portable. There are a food grade silicone seal inside the cap, which is leak proof. It's perfect for carrying wherever you go Environmental and Healthy Material--The bottle is made from ultra clear borosilicate glass, which is known for environmental and healthy . No chemical leaching or metallic taste. BPA-free, phthalate-free, FDA approved materials. The cap is made from food grade stainless steel , and seals are made from food grade silicone The glass water bottle will not explosion due to alternative from high and low temperature--The glass has low expansion rate, high temperature resistance, high strength, high hardness, high transmittance and high chemical stability Useful Nylon Sleeve--The nylon sleeve is heat insulation and effective protects the bottle form damage . It provides a non-slip surface which is easier to grip against falling off . Quiet when you set it down Easy to wash-- The glass bottle is super smooth, which is very easy to wash just by clear water. Hand wash is recommended; lid could be cleaned by dishwasher