Used coffee has far too many uses to go in the bin. One of the best uses is to compost it or even use it straight away as fertiliser for your garden or plants. You may have heard of NPK, which stands for nitrogen, phosphorus and potassium and is a very common fertiliser. Used coffee contains all 3 of these and even a handful of extra minerals too. All plants will benefit from used coffee in moderation but one plant that loves loads of it is tomatoes, used coffee will eventually up the acidity of soil which tomato plants prefer.
There are other uses such as using coffee waste as a cleaner, an odour neutraliser and even a skin exfoliant but the easiest and least messy use, is in the garden.