This coaster holder is designed to hold mostly common coasters from IKEA (IKEA HEAT, 19cm). The idea was during cooking when your coasters are lying on each other and on the top something else and you want to set aside a heavy and hot pot ... .

To hold the coasters in position it's round in each slot bottom (for IKEA HEAT, 19cm).

It's designed in FreeCAD version 0.20 revision # 26858. In the files u will find the STL file and the FreeCAD file.