Best examples of a really good design
![main-qimg-41e4f4e0dae402f0953dae6bba24b647.jpg](https://steemitimages.com/640x0/https://cdn.steemitimages.com/DQmNUxtvB2bsa79TrjDJgovcSLPgusJxeQDopSbjQCBRwyX/main-qimg-41e4f4e0dae402f0953dae6bba24b647.jpg)
The glass tube holds exactly one liter of water, sufficient for a quick handwash. The theory being that we waste almost six liters of water and use only one, while washing hands. Once the stored one-liter is used up, you have to turn-off the tap till the next one liter fills up the tube. A cumbersome rationing process that will hopefully drive home the point of conservation!
Thanks for reading...