I'm waiting for my full size oil comtrol serumt o arrive in the post. I love this lovely little serum it's fan-taz-mo, after applying I would apply a little untinted oil control blur (and I mean a little) just an extra safe guard and it works wonderfully. But since finishing my gumball size and waiting to receiving the full size has been around 2 and half weeks and I don't like it

I never want to be without the serum again!!!! So I'm thinking of ordering another one as a spare but I was wondering about the shelf life of the product. Is it like the vitC serum where you have to use it within a couple of months, or does it last longer?????
thanks
Sarah