Made Of High Borosilicate Glass With Silicone Sleeve, Screw On, Spill-Resistant Lid, Wide Mouth Opening, Water Drop On Lid Keeps Track Of How Many Bottles Of Water You Drink, Twist Lid Every Time Bottle Is Refilled To Update The Water Symbol On Lid To Indicate Hydration Progress, Meets F-D-A Requirements, BPA Free, Hand Wash Recommended