Summary

These are my first two 3d models for printing. Made in Microsoft 3d Builder.
If you are involved in computer networking or IT these might look good on your desk.
The rectangular design is the network diagram symbol for a network switch, the circular design is the symbol for a router. The designs are recessed slightly into the base to allow you drink to sit flat in the coaster. I also added a small chamfer around the lip to make it a little easier to get your drink in the coaster. They are fairly large and should accommodate coffee mugs and large glasses