Wall mount sponge holder

A basic kitchen sponge holder, designed to be wall mounted with a good two-sided adhesive tape like 3M GHB or similar.

The base is a square of 30mm and there's also 30mm clearance - a standard, rectangular sponge - all of us have - is 20mm thick when new.

I used standard supports from the base with the piece laying on its back - your results may vary, do experiment.