So I like to make sugar scrubs and put them in little 4oz size plastic jars. I've never made them for anyone but myself and one friend, but I have people looking to purchase a couple now. I was wondering, since (at least I) you can keep the scrub in the same jar, and have to scoop the scrub out, should it have a preservative to protect from bacterial growth? I just wondered since it's something I imagine most people would be reusing and putting their fingers in.

I was thinking I could try the aloe liquid here that has the preservative already in it. Would that be a suitable addition to a sugar scrub made with white sugar, almond oil, and vitamin e?