When using baking soda to deodorize a refrigerator or freezer, we always used to just tear off part of the baking soda box.

When you think about it, this doesn't really expose much of the baking soda's surface area to the air, so it's much slower and less efficient at sucking out those old-food smells.

Enter: the Baking Soda Odor Trapper! Expose a MUCH larger surface of the baking soda to your leftover takeaway's, er, fragrance, allowing the baking soda to operate much faster!

The funnel top makes it easy to pour in baking soda with minimal mess, and the front tray catches any that might spill out when your kid bumps it while grabbing his Lunchable.

There are two sizes: one designed based on an 8oz box, and the other based on 14oz.

Printing:

No supports should be necessary. There is a fair amount of bridging, but I'm sure your printer can handle it.*

*I've never met your printer. I'm just being nice.

EDIT: Added a couple of new braces to make bridges shorter. Not shown in renders.