LED illuminated ice cup

thingiverse

This small LED illuminated cup not only lights up your drink but also keeps it cold during those warm summer nights. Fill the outer cup with water (see image) and put it in the freezer. In the base one bright 5mm LED and small batteries are installed. Use white or transparent filament for the top part. Most likely some support material will be generated on the bottom between the cups that you can't get out but that's fine.