The plastic tub of unique is what I’ve been using. I had to remove a stuck case for my son, he tried to be lazy and used one shot spray. I showed him what I used, and I haven’t heard about anymore stuck cases by him.If I read the Hornady site correctly, they have 2 different products: A wax (competing with Imperial, I assume) in a metal tin, and their Unique lube (in a plastic tub.) Never tried, nor seen, the Unique.
I bought some of the Hornady wax to melt into a smaller tin to keep in the die box to neck size at the range (couldn't get Imperial at the time); it seems to work as well as Imperial in the sizing department, but it (in my experience) degrades a bit if you lube a bunch of cases and set them aside for couple of days before actually sizing. The Hornady is also a "stiffer" formulation than Imperial (more towards the candle spectrum than Imperial's tending towards a really thick grease consistency.)