Olympic Fit Insulated Stainless Steel Water Bottle, Wide Mouth, 40 Oz Blue Drink safely & with peace of mind -our bottles are made of premium food-grade 18/8 durable stainless steel and are BPA free Wide mouth opening -the 2.25 Inch opening makes it easy to add ice, clean and pour Mega capacity -no refills needed with this large sized 40 ounce Double wall vacuum insulation -experience up to 6 hours of cold or hot temperature maintenance without the hassle of a cooler or reheating your beverage