It's pretty common practice amongst RV'ers to organize stuff in the pantry into plastic dish pans, or tubs. (Rectangular, soft rubber/plastic about 12 x 24 in and 6 in deep)
They are really good for things that spill, such as liquids or powdered things like sugar and flour. We have one for coffee and tea stuff, one for cooking oil and steak sauce and that sort of stuff and one for cleaning supplies like dish soap and 409. I just didn't see them in your picture. And those curtain rods also work great in the fridge!
Our canned goods travel in what we used to call "soda flats"... those milk crate like things that bottled soft drinks travel in (and I'm not really supposed to have.)