Some serious design considerations went into this, probably more than needed but here we are.

It has chamfers and you can add more if you like and its not a torture test with thin lines to hopefully avoid stringing for obvious reasons (you are using this to hold the thing you wash your hands with) that being said use PETG if you are going for a more correct filament and make sure you are dialed in with your retractions for stringing. 

The first consideration, printability. The width and flat top of the fins that the soap sits on should be wide enough to allow for a minimum of stringing as well as durability. All thanks to chamfers.

The second consideration was useability, if you have a bathroom and a kitchen sink you might print 3, one for the shower, bath-sink, and kitchen. If you have a house there could be many more. A quick gift for a loved one that might be doubting your 3D printing spiral that you could be inevitably in, showing them that there are use cases in life for your mania that is designing and printing. The gifts are endless money printing machines too, especially when you are coming in at 40 grams (39.43 with a brim) its the smallest sample spool Creality sends with printers and you might have a sealed bag sitting there.

The third consideration was to use my skills to the most efficient degree. This was done with a 25 minute sketch in fusion360, 3 separate extrudes and 5 groups of chamfers (more if you want) with a 1:50min print time. 

My thought with that math is that a 30 minute trip to and from a store to get said object with gas wear on your vehicle and headache of looking for what you could like and dealing with people as a whole. Its far more worth it than not to 3D print yourself a better life than to deal with what mass consumer society tries to feed you.