Plum Island Soap Company Momma's Belly Balm Butter - Lavender and Peppermint 6 OZ Jar. Moisture for growing bellies. Our all natural nourishing butter. Is formulated with pure olive oil and beeswax to help keep skin soft and supple. A thick, rich cream for growing bellies and all over for Moms to be! We use pure olive oil as a base mixed with sweet orange, lavender, and just a touch of peppermint. Consistency is a thick, rich butter for growing bellies and all over (hips, thighs, breasts) for Moms to be! We use sweet orange, lavender, and just a touch of peppermint for a heavenly scented product.