Our 35oz water bottles with measurement are made with Eastman Tritan plastic, BPA-free and toxin-free, co-polyester. Which is equipped with straw has the capacity is recorded in ounces, which can better help you track your daily water intake; Besides, the plastic water bottle with flip-top is designed with a safety lock, to make it dust and leak-proof. The wide-mouth design make it easy to fill with ice cubes and fruit, and easy to clean. With a sturdy handle, it is easy to carry this bottle with you wherever you go. Ideal for camping, running, Yoga, gym, home, and office.