My friend Tom asked me to make these coasters for him.

They are stackable (hence the lip at the top of the outer shells), the inner coaster piece features a honeycomb pattern to allow condensation from your drinks to collect in the outer shell (protecting your tabletop), they are easily disassembled for cleaning, and they come with a coaster caddy that fits three to four of them when you want them put away.

The outer shells and the coaster caddy feature pockets in them that can fit three 15mm x 2mm round magnets. In the Bambu Studio file, I have included a pre-programmed print pause. This will pause the print after the pockets are made, but before they are closed off, so that you can insert the magnets.

The pockets are actually modeled as 15.1mm outer diameter x 2.1mm deep. The magnets I have are sold as 2mm thick, but are actually ~1.8mm thick. Make sure your magnets aren't sticking out of the pockets before resuming the print so that your print nozzle doesn't collide with them! My magnet's outer diameters were actually 2mm - I found the 2.1mm pocket size was snug enough to keep the magnets from jumping out and attaching themselves to the printhead (no glue required - but you can use it if you're nervous, or if you have smaller magnets that won't fit snugly).

Tom requested the magnets because he has a fancy desk made out of magnetic material, so they will stick to it. Maybe you have a surface that would benefit as well. If you don't want to use magnets in them, they are still great coasters and will print fine without inserting magnets!