10mm Plug

In order to drain our garden plants in their buckets, I drilled 10mm diameter holes in the bottom, so the excess water can run off.

And just to make sure, I obviously drilled A LOT of holes. 

Turns out we did not need that many holes, and we would like to retain a bit more water in the buckets…

So instead of buying new buckets, I get to fix it… 

Up to about 3mm plastic thickness. 
Print in something flexible, or on the side so that the print-lines run “up and down” so the pins don't snap off.