A small case where a micro pump can slide into it holding it under the water.
Designed for the following water pump:
https://www.amazon.com/-/en/dp/B09185Y8BN/ref=sr_1_7?keywords=micro+water+pump&qid=1687333932&sprefix=micro+water%2Caps%2C257&sr=8-7&language=en_US
The author marked this model as their own original creation.
