304 stainless steel, retractable and foldable, put into the bag, small and portable, suitable for outdoor travel carrying.
Telescopic extrusion principle design, cup up and down small section design, retractable folding, through the principle of rotation and extrusion to narrow so that there is no leakage, high temperature scalding water is not deformed, smooth and burr-free fit to the lips, drinking water more smoothly, hanging chain design can be hung on the keychain for daily use.