The most metal way to recycle your water bottles: Make them into DIY rockets
Obviously YOU don’t drink water from plastic bottles, unless you’re somewhere where the water isn’t safe, or you’re at the gym and you forgot your Klean Kanteen, or you’re super thirsty and desperate. But lots of people do produce plastic bottle waste. And sure, you could spend the energy to recycle them into other bottles, OR you could make them into badass flame-powered DIY rockets. (And you can still recycle them into other bottles afterwards!)
This may not be a sensible alternative to recycling, but it is an excellent alternative to NOT shooting flaming bottles at stuff.