Instead of doing a coffee reading, why not make used grounds into cosmetics? Here is a simple homemade facial scrub in the spirit of zero waste.
Take the coffee grounds from a coffee pot or machine and submerge them in olive oil (it can be from a press) or linseed oil. If you have argan or almond oil in the house, even better. Add a teaspoon of vinegar (e.g. cider or wine vinegar) and a drop or two of your favourite essential oil. Keep in the fridge in a wide-top jar so you can get the contents out easily. You can also mix the coffee grounds half and half with oat flakes left over from making oat milk, or with green tea leaves, dried (after steeping) and then ground (in a coffee grinder).
Pluses: this facial scrub is excellent for the skin and the wallet. It oils, moisturizes and energizes.
Minuses: once you’ve washed it off, it’s time to clean the bathroom.