I want to use all the space in these tiny refers..

doubt I'm the first person to upload one of these so credit to whoever already did it.. (got a mild case of search-fatigue this evening...)

I don't use the can holders in my 2 mini fridges, so I tried a couple different shelf designs. This one is easy. Remove the metal grate. Print a shelf, drill 3 holes and you're done.

Holes should be around 1/4 inch. Measure twice and drill once... Lots of curved surfaces in there so don't rush the layout. And the plastic walls are very thin and soft so take care.

Afinia, 26 grams ABS, minimum fill, ~55 minutes..
No raft, but don't be surprised if it prints a thin facsimile of a raft anyway... might be an old firmware bug or it might be this shelf's particular geometry.

The part takes up the entire width of the Afinia build plate (~5.5 inches) but that's ok because the compartment width is constant, top to bottom.
The depth of the shelf can be scaled in or out to fit the places you want shelves. At least the rear wall of my can holder compartment curves in and out, so the shelf depth does vary according to position.