This item is for use with the #GridFinity system by Zach Freedman:
https://www.youtube.com/watch?v=ra_9zU-mnl8
UPDATE 4 Added 3x5x2 and 3x5x1 as per request. Since I've been accused of being un-intellegent (yes hyphenated) in the comments I've resolved never to add a readme file to any of my models. You'll just have to remember where you downloaded them.
UPDATE 3
As per request, added 1x4x1, 1x4x2, 1x5,1 1x5x2.
UPDATE 2
More new sizes, as per request. Also added the source file, though I'm not sure anyone will understand my crude methods.
2x3x1 2x3x2
2x4x1 2x4x2
2x5x1 2x5x2
UPDATE
A set of Gridfinity baskets with a hex mesh grid. Multiple sizes now include (WxDxH):
1x1x1 1x2x1 1x3x1
1x1x2 1x2x2 1x3x2
2x2x1 2x2x2
Contrary to Zach's instructions, I've been printing all my modules with a 0.8 nozzle, which seems to work just fine. The basket was printed with silver PLA at 75mm speed on an ender 3 pro with 0.8 nozzle and 0.32 layer height without support. The basket is slightly spongy and flexible. Remove any stringing with a heat gun or lighter.