Made this spice rack to both fit in the cupboard stacked 2 high, and to fit on my print bed.
Designed to fit the Coles spice range of square bottles, which measure 40mm x 40mm at the base. I printed 2 of them and joined using Loctite 401. The slots all have a 2 degree down slope to the back so the spices don't slide forward, and with 1mm of clearance per hole things are snug yet easy to remove / replace.
I printed this one using Cocoon Create transparent purple because that's what my wife wanted, but would look equally good in a solid colour. Print at whatever speed you're comfortable with, but I printed it at 80mm/s with a cobra cooler installed. No wories.