I guess they named it after the fantastic product that "lets your soul shine through" from the film Coming to America. In this movie there is a scene when the couple gets off the couch and there is a stain from where their Soul Glo seeped into the cushions.
Here's what they saw:
Funny thing is...just yesterday I was having a BBQ Pulled Pork-Mango-Pickle Sandwich (a recipe of my own concoction), drinking out of a juice jug (no glass), in my undies, on my frilly-doily-covered-queen-anne-chair, watching I Dream of Jeannie. It looked a lot like the above picture. And I'm okay with that; Cuz I'm an adult and I can have cookies for breakfast if I want to. Jelly?