Our glass water bottles are made of a pure glass material which is extremely safe, PBA, and lead free which is known as a kind of special Environmental and healthy Glass material ideal for keeping water, drinks, juices, brew, coffee, tea, sauces, salad dressing, kombucha, kefir, fermented drinks etc. Product description Capacity: 18 oz (set of 6) Color: Clear bottles with Colorful sleeves Bottle measurements: - 8.9” high - 2.7” diameter - 1.5” mouth diameter Unique Features: Top quality, bottles made from lead/cadmium/BPA/phthalates free, food-safe thick soda lime glass with superior impact resistance. Caps with 201-grade stainless steel and a food grade silicone O-ring for an air-tight. Easy to clean, surface of bottles is smooth and using the large bottle cleaning brush will be more convenient. Slim design for easy storage in a fridge, cupboard, handbag, gym bag, school bag, and most cars' cup holders. • Do not sterilize the lids and O-rings in hot water. • Do not use the glass bottles to take water with extreme high or low temperatures. • Do not put the glass bottles in the microwave or in the freezer. TOP-QUALITY Our glass water bottles are made of a pure glass material which is extremely safe, PBA, and lead free which is known as a kind of special Environmental and healthy material ideal for keeping water, drinks, juices, brew, coffee, tea, sauces, salad dressing, kombucha, kefir, fermented drinks etc. AIRTIGHT Glass bottles are healthy alternative to plastic bottles. Each bottle comes with a leak proof cap with stainless steel and a food grade silicone O-ring for an air-tight. Preserve the flavor of your drink, oxygen can't get in to break down the enzymes or ruin your juices. CONVENIENTLY Each product includes a colorful Nylon sleeve for protection, decoration and greater insulation in temperature of water bottle. It conveniently fits into tight spaces without using too much space! It also easily and neatly fits it into your refrigerator, lunch bag or car holder. Gifts Glass bottles are super smooth which are easy to clean by clear water. Inside the package, additional one stainless cap and a large bottle cleaning brush are ready for your convenience. Each package we have prepared one more cap with 201 stainless steel and silicone O-ring and bottle brush for you.