easy-to-print and very well functioning sieve/strainer for shower/bathtub or kitchen sink. In compariason to the common ones with just holes on a flat base, this one has a much higher cross-section for the water flow and can thererfore pass much more water through it. Also it has a finer mesh/grid/slots as the big holes in commercial ones. The indentation on the bottom collects e.g. hair and keeps the upper slots open for the water flow to prevent clogs.
The author hasn't provided the model origin yet.