Here are eight different icon coasters, with a four coaster holder.

Stack these up and when you need to entertain just pull these out and there's a conversation starter. For games, for fun, but probably not for keeping your bench completely dry…..

Hot drinks: good. Cold drinks: hmm, some water will get through. All drinks: Very fun!

Source: Created in illustrator and modelled in Fusion360.
Photos: Printed in 1.75mm PLA filament on MK3S with the 0.4mm nozzle.
Slicing: No supports! 3 or 4 perimeters for added strength. Brim if you see the edges lifting up at all after printing.