Recently (as of this upload) decided to try my hand at some DIY hydroponics. Since most of the videos and such I see online preach about limiting how much light gets into the reservoir, I decided to do something a bit more than just put tape or cotton or whatever over the cup.

This will let you simply fit the cap into a 2" hole in your hydroponic setup.

I didn't use supports, but the indent for the pull is a bit steep and out of four prints of this, only one of them printed out perfectly.

...They ALL printed out great, just a lot of sag from the steep overhang.