GreEco Double Wall Vacuum Flask, Insulated 18/8 Stainless Steel Water Bottle, 25 OZ, Cobalt Blue, Food Grade, Keeps Drinks Hot for 12 Hours and Cold for 24. Double wall vacuum, both inside & outside walls are made from 100% food-grade 18/8 STAINLESS STEEL, COPPER COATED. When shopping around for an insulated bottle, note that what many of other bottles are only inside wall 18/8 stainless steel, some other bottles even both inside & outside are made from 18/0 sainless steel, no copper coated, indicative of inferior quality, but you maybe not find the difference from the apperance.- Don't be fooled by imitators! KEEP DRINKS COLD FOR 24 HOURS, HOT FOR 12 HOURS-Our double-walled vacuum insulation technology & copper coated, keeps your beverages exactly how you put them in! Enjoy cold or warm beverages all day long whether you are outside playing a sport, at school or inside at work all day, ENGINEERED TO STAY DRY,NO SWEAT or LEAK - This 17oz bottle has been specially engineered to stay dry and no sweat or leak. Stop worrying about liquids sweating in your bag or purse, our bottle is the answer! The sleek cola bottle design is COMPACT AND CONVENIENT, 10.1" in height, 2.8" in diameter, mouth 1.4", and only 11 ounces in weight, with a 17 ounce (or 500 ml) capacity. It fits comfortably in the cup holder in your car, the water bottle holder on your bicycle, or the water bottle pouch on your backpack, or wherever you want it to go. BPA AND PHTHALATE FREE, FOOD GRADE STAINLESS STEEL, healthy water, healthy life, you will love it yourself and want to gift it to family/friends.