Cream and grease based body paints are a great addition to any kit. They offer high pigment, are waterproof and can repair cracks in wet makeup. They do need to be set with powder and some never fully “dry” and can smudge. Creams are great on the face and do not feel drying.
Be sure to use you spatula to scoop out product and work from a palette to avoid spreading bacteria from person to person. This will also ensure you do not contaminate and mix colours within the pots.