A simple soap tray, lots of open area for good air circulation.
Takes 14 grams of material; run time about 1 hour.
Files included are .STL,in (units are mm), .STEP in mm and .ICD(IronCAD).
The sample was run on an Ultimaker; run time was 1 hour. Part was sliced in Cura, material was PLA, temp was 220, layer height .20, fill 20%.