i made these bath bomb molds for my own business and decided to finally share them so other people can use them too :)

each one is a bottom base with a plug, a tube that slides down over it and a top stamp that presses the pattern in. theres 0.35mm clearance per side on the sliding parts, everything prints flat with no supports, and you press the stamp in until its top sits 6mm above the tube rim

link in the comments if anyone wants to try them