This is a stackable shelf for those dog lick mats so you can place them in the freezer without taking up a ton of space.
I printed mine in ASA and they are strong enough to hold a bunch of stuff above the mats.
The posts have spaces to place magnets, but because of how I avoided problematic overhangs in those posts you'll need to use the plug file I included to plug the post before adding the magnets.
Here are the mats I use for compatibility:
https://www.amazon.com/gp/aw/d/B0C3ZJH33F?psc=1&ref=ppx_pop_mob_b_asin_title
https://www.amazon.com/gp/aw/d/B0B795Q9MG?psc=1&ref=ppx_pop_mob_b_asin_title
The author marked this model as their own original creation.