Proraso expiration time

How long till Proraso aftershave expire? I am at the half of the Proraso white http://www.amazon.com/Proraso-Liquid...rhf_gw_p_img_5 and just bought a Proraso with vitamin E and aloe Amazon.com: Proraso Alcohol Free Aftershave Balm - Aloe and Vitamin E - 3 PACK: Health & Personal Care.

I'm not sure that they have an applicable expiry. I have used and am using some stuff that is several years old. If they expire it is either a very very long time away or isn't really relevant to the effectiveness of the product.