(relatively) recently in Poland a law was passed that made containers for most of drinks recyclable, with a refund for returning them to the store. We started collecting them so that we can buy biscuits for the open meetings. Unfortunately the refunded bottles can't come crushed, so they take a lot of space. Luckily, one of our members brought a couple of those giant cardboard bins (the photo was not made in the hackerspace). Things are tidier now, hurray!