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Would A Wireless Shower Head Use Hydrogen?
(lemmy.world)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
I imagine a wireless shower head could just be a squirt gun type deal with a shower head on the end.
Or, to stay close to your example, why not two canisters, Hydrogen and Oxygen. Then you're not sucking all the oxygen in the room.