Also when I make tea, every timehttps://twitter.com/incendavery/status/1224867834309857280 …
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Omg! :D So I am thinking wet cardboard rips easier than dry one. So single-use timer based on capillary effect? When it rips it pulls out the tea bag, or drops the cup. Would require some testing to see how reproducible the timing is.
Or use capillary effect to move liquid to slowly change the balance on a makeshift scale. That's probably even better..
just don't dip the cardboard into my tea, I'm sure that won't improve the flavor xD there's always a bit of leftover water that I can put on The Contraption™ though
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