Each 3MF file contains two parts, you need to rearrange them to lay flat. All inclinations to not got below 30° so parts could be printed without supports (although inner side will not look smooth but who matters 😄). The top can be secured with four ⌀2×10 mm screws. The inner volume is supposed to be filled 50% with beer, and whole trap to be digged into the ground for 2/3 of the bottom part height. Dimensions (D×H):

• Large slug trap: ⌀100×90 mm
• Small slug trap ⌀80×70 mm

P.S. Inspired by this model but my model has inclined walls and screw holes.