Finding a decent coaster

[Groves]

If societies are measured neither by military might nor technological prowess, but instead by the quality of their drink coasters, then I think we're not even in the running.

I need to solve this dilema before the season gets cranking. What say ye?

Quality = Not having the coaster stick to the glass for the first 1/3 of the trip only to leisurely freefall at some time hence.