40 ounce wide mouth, vacuum insulated water bottles are of perfect size for a daily use bottle, and sized perfectly for easy grip. Its 40 ounce capacity is the ideal size to fill with your favorite beverage of choice, hot or cold. The double-wall, vacuum insulated bottle is specifically designed to keep liquids hot or cold all day. Double-wall technology also prevents condensation and keeps the outside wall of the bottle at a comfortable temperature, regardless of whether it is carrying a hot or cold beverage. The bottles are constructed from high quality, food grade 18/8 stainless steel, which unlike aluminum bottles, does not require any kind of liner. The stainless steel bottles will not retain odor or taste, and are 100 percent recyclable. All components of the bottle, including the lid, are 100 percent BPA free.