Neat set of 8 coasters. The tops all look good with minimal ripples on them. Most of the bottoms are fairly smooth, but three have ripples.  If you look very closely at the tops it looks like they need to be washed, but it is just the way they are made (looks like water spots but it is the plastic). Sounds bad, but I just want you to know they are not shiny like glass. All are flat on one side and recessed on the other. Ready to ship. Thanks!