I chanced upon this website about how to check the expiry date of cosmetics which i find it useful for all of us here! You can easily check out the expiry date of your current cosmetic by keying in the batch no. (usually they are useless no to us shown on the box) into the field on the website and select the brand (although not all brands are covered but majority popular ones are). The cosmetic calculator will show the manufactured date, lifespan, expiry date and remaining lifespan of product immediately!
Website: Cosmetic Calculator
I tried with my MAC Suntint SPF20 Liquid Lip Balm, purchased early last year.
Select brand:
MAC
Enter code: B49
Date of manufacture:
April 2009
Shelf life: 36 months
Exp.: 03.2012
Expire in 7 months
MAC
Enter code: B49
Date of manufacture:
April 2009
Shelf life: 36 months
Exp.: 03.2012
Expire in 7 months
Its really useful as there are time i do struggle to keep the stash but this got me more determined to clear out expired stuffs!