A chemical calendar

BASF is a well-known chemical company. Who already dream to have a calendar that disappears with time? BASF created a daily experiment calendar. Made with 12 test-tubes each of them are fill in with c...

BASF is a well-known chemical company. Who already dream to have a calendar that disappears with time? BASF created a daily experiment calendar. Made with 12 test-tubes each of them are fill in with colored eco-aqua ink. Each tube represents a month. The daily evaporation indicates the date of the month and the day of the week.