Made with acrylic yarn, so how about using them as eco-friendly scrubbers or mats for small items? In my home, I use the smaller ones to wash my cat's dishes. It's safe and doesn't require detergent♪ Maybe too small for coasters... This is a set of 12, with 6 medium and 6 small sizes♪ ※※I disinfect my hands, but since I knit them by hand, I'm listing them as "like new." ※※I try to knit each one carefully, but they are handmade by an amateur. Please handle them gently. Thank you for your understanding. ※※I have one cat. I am a smoker. I am very careful, but please understand this as well. m(_ _)m ※※The actual colors may differ slightly from the images.