Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:6022975.

Holds 6, NP-FW50 batteries (I use them for my Sony a6300 mirrorless camera). I printed mine from clear PETG and they've held up great over the last couple of years. I've tossed it in countless backpacks for multiday back-country trips and car trunks for road trips and it's still holding up just great :)

Personal tip, I put the batteries in with the electrical contact in (not visible) after charging them, and then flip them around so that the contacts are facing out when they're drained. I can quickly and easily find a charged battery and/or see (or feel, if I'm out shooting night skies) how many charged batteries I've got left in the bag.