What secret from a former job can you reveal now that you no longer work there?

Saw this question on a really old AskReddit thread, and it made for a very interesting read. Learnt that Lancome is exact the same products at Loreal but 20% more expensive.

But most of the things were US related. Got me curious what the Indian version would look like.

Looking to learn some industry secrets, TILs, and more :)