I already use a reusable bottle but I do more. I take things like cardboard and plastic and I build something from it. I did a game for my brother's birthday. You have water in a bottle and there is a elastic in it. you need to catch it with two little stics. I also made him a Thor hammer out of stirofom (It wasn't really solid, I have to admit it...). I will maybe put the link of some videos as a reply.

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