I was inspired by some stashbusting groups to work this up using some of my scraps! I literally had just enough for the drink colour on the kitchen counter for a couple months. This is one one size pattern however if you want you drink colour to be bigger or smaller feel free the adjust those rows.

While i have suggested using Bernat Handicrafter any 4 weight will work. I dont recommend acrylic for a scrubby but a coaster with warm drinks or as a magnet would be great! Cotton yarn will work best for a scrubby or hot drink coaster. Testers used I love This Cotton from Hobby Lobby, Sugar and Cream Cotton, and for the foam(top) Red Heart scrubby, Pipsqueak or any 4 or 5 weight polyester will work. This is a scrap buster great to quickly work up for craft fairs and simple gifts. Check out the projects for more great ideas. Feel free to sell items made with this pattern but please link the pattern back to me!
I used a 4mm hook.
Happy stashbusting!