It uses discs inserted in the cover, then drink the water it contains as with a water bottle.
A straw provided for insertion into the body allows drinking leaving vertically (it is quite confusing at first).
Its capacity of 0.6 liter makes it the ideal companion for a day at the office, a good compromise between weight and the amount of water to drink regularly and it fits easily into a briefcase or bag.
Being able to fill any faucet provides drinking water of good quality throughout the day.