With its double wall vacuum insulation with an additional copper plating allows for extreme temperature retentionGreat for both hot and cold beverages. Keep ice cold up to 24 hours, hot for 6 hoursAll Tahoe Trail water bottle are made of non-toxic. BPA free plastic and 18/8 stainless steel and it will never rust or leave a bad metal taste in your mouthTahoe Trail 12 oz water bottle fits cup holder and coffe machine, 32 oz and 40 oz capacity are large enough to fit your dialy hydration needs. powder coating 18/8 stainless steel we have chosen from the most popular colorsThe handle lid makes it easy to take with you or store in the bag while hiking, biking, shopping, fishing, road trips, sport events, office.