The Stanley Quick-Flip Go Water Bottle is designed with a push button to flip-open the leakproof lid . The larger mouth opening gives you the flow speed that you need . Thanks to the steel latch that holds the top extra tight , it can be safely packed in any bag without a worry . On the way to your adventure it rides along fitting in most cup holders . Manufactured using 18 / 8 stainless steel , this bottle can take a beating and is BPA-free - so your drink stays safe to consume .