Some cycling water bottles already do that kind of thing:
> The Purist WaterGate Bottle features an amorphous silicon dioxide coating that's infused into the inner-wall of the bottle. Essentially, this forms a glass-like finish that provides a totally natural, and completely inert, solution to the problem of your drinks staining the bottle or leaving behind any residual aftertaste. This infusion also shields your fresh water from tasting like plastic on very hot days, making it akin to drinking straight from a sparkling clean glass.
It's not perfect in practice though (I find that the bottles can still absorb flavors of sports drinks, especially if you forget to wash them immediately after a ride). But they definitely don't have the plastic taste and smell of other bottles.
Some species like Psilocybe semilanceata grow in the wild, both in Europe and North America. You can just pick them if you know the type of habbitats to look for.
You can buy grow kits semi-legally (grey area, might vary on where you live) and you don't need any extra equipment. You get a plastic box and you literally just add water.
If you want to save money, you can buy only the spores. Then you just need some substrate which you can buy either at garden supply store or at a supermarket. Biggest issue is ensuring sterility, so a pressure cooker is recommended, but there are ways around that.
I'd say it's easier to grow shrooms at home than it is to make alcohol. You don't need any specific equiment like a still for distilled drinks, and you don't need any trial and error like you do when making fermented drinks. I know you could make alcohol without any equipment, but the end result will probably be quite poor. Meanwhile the shrooms grown without any equipment will be the same as any.