Have you heard of or actually eaten cupcakes in a jar?

I don’t know how new this is but a couple people are now millionaires from baking cupcakes and lowering them into Mason jars. Then they put lids on, wrap a ribbon around them and put custom made labels on them. They layer the contents so it is very colorful looking at the jars from the side. Have you heard of them?
The lady on Fox sold 750K last year and is projected to sell 2M this year at $7.99 each. The shipping is quite expensive if you want to mail them out.