Impress your friends & family with your knowledge of Voronoi patterns.  This set of three coasters includes Poisson, Monte Carlo & Double-Poisson distributions.  

Each coaster has an inside diameter of 95 mm to accommodate larger wine & water bottles.

Here are the 75 mm coasters for glasses and narrow wine bottles: https://makerworld.com/en/models/166148

The coasters stack well, and also stack with the spiral coaster: https://makerworld.com/en/models/30059#profileId-26403