this post was submitted on 21 Sep 2023
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Yeah, so don't throw out those used coffee grounds, just mix them with the carboxymethyl cellulose powder you probably have in the cupboard, and the leftover xantham gum you have laying around.
Then make a custom syringe feeder for your 3d printer.
Both of those ingredients are cheap, and Xantham Gum in particular is used in gluten free baking recipes a lot.
its a thickener in sauces too, very handy and all natural despite the scary name
it can also be used to make frappucinnos, since you're already making coffee.