This is a water bottle for hydrogen water, suitable for use at gyms, yoga studios, etc. I received it when I signed up for a hydrogen water server. The capacity is 500ml. It can be used for both room temperature and cold beverages. I have used it a few times. It has been washed and dried. It can also be used as a regular water bottle. Thank you for looking. #yoga #fitness #gym #pilates #hotyoga #lava #LAVA #soelstudio #waterbottle #tumbler #bottle #hydrogenwaterbottle #hydrogen #hydrogenwater #mineralwater #red