I keep a set of these solid granny squares on my desk. I often drink coffee and my cup tends to leave a ring on the desk. These coasters eliminate that problem and can double as a rag. I simply toss them in the washing machine, hang to dry and ready for use again. You can make plenty and strategically scatter them in the house to help keep your surfaces tidy. and because it's cotton, they absorbs liquid pretty good and are very sturdy.