a cold plate for cooling drinks while you are enjoying the day in the pool....
I made a plastik housing which clips onto the corner pieces of an intex-pool.
Add a metal (aluminium) plate on top, seal it tight with some glue and use cold water as coolant for the plate. I used my (otherwise unused) water from a small spring.
hose adapters for normal garden hoses (ID 12,5mm).
works great if you have a cold water supply
Solidworks Assembly and Step assembly attached, if you want to change it