A bread slicer that will fit on common print beds. The outside dimensions are 200X155X137mm. The slots are 3mm so any kitchen knife should fit. Its not long enough to fit a whole loaf but I just cut half the loaf, remove the cut slices and cut the other half. If you do 10% infill I would recommend at least 4 shell layers so your knife wont wear through the base quickly.

V5 has a solid base and back.
V7 Has voids in the bottom and back in an effort to save material and print time but accomplishes neither in the end due to solid wall infill around the voids. Looks neat though.

Added a new version that has more support at the base of the guides for more strength.