Come and check our branding solutions. The water tumbler is made of borosilicate glass with a food-grade, eco-friendly silicone sleeve, BPA free. The water bottle lid with a food-grade silicone o-ring effectively prevents water leakage. These bottles are your perfect daily hydrating companion. You can use them when traveling, hiking, camping, at the beach, working out in the gym, at home, or in your office. Please check inventory and detailed info before placing your orders.