Come and Check Our Branding Solutions.This hydration flask is only 1.4oz.It foldable and can be fold into a small size.With a large opening,it is convenient to pour water into the soft flask.Both the water bottle and the straw are made of TPU,and the mouthpiece is made of TPE,wear resistant and corrosion resistant,BPA free and do not contain any harmful ingredients,no peculiar smell,The hydration water bottle is designed with a pull push switch,which can automatically seal and prevent leakage. Pls check inventory and detailed info before placing your orders.