So, this is day 1.
As a day one, it was preatty successful: I didn't trow away any piece of plastic at all. Usual life: drinking tap water, carrying around my fabric bag, no visit to the supermarket. Mmmh, hold on, actually I used some yist (to make bread), it was wrapped in a piece of paper,which, as usual, was packed within plastic. Ok something went to the trash, still not bad at all.