Floor Coaster

I designed this coaster because of my friends keep putting their drinks on the floor and knocking them over. First useful thing I've designed and hoping to do more! Currently working on several different versions with different features. Not entirely sure when those different versions will be done due to limited free time or if they will be uploaded here. The design was intended for carpet floors but can be used for tables, desks, or hard wood floors with the use of some rubber feet. Hope many enjoy this coaster and thanks!