Not such a long time ago, people used to throw a silver coin into the water stock because of the metal's antibacterical and germicidal properties.
Having water was more important than having money...
This carafe reminds you everyday to save water.
The message becomes even more obvious as the level of water goes down and the words become ever more legible.
Finally, the process of oxidation darkens the words slowly and emphasizes the message more each day : SAVE WATER !

An safety accessory to go biking in town.
Open the "wing" and click it like a computer mouse to switch it on.
Front light included

just a drop, not technical at all.
Just push up and down to change the waterflow.
Back to simplicity.