Re: expiration dates on shisha?
Usually shisha has the production date to see how fresh it is. Expiration date is pointless. shisha never expires if stored right. But usually after two years in the box it starts to lose it juices and becomes tasteless and does not produce those thick clouds anymore. I used "expired" shisha hundreds of times and some of them were better than non-expired due to good storing.
If you go to a shop in person try to get a fresh tub as it will always be better. thats my advice. I, even if i order from phone, ask whats the production date and ask for the most recent.