As with the Butter Chicken, and the Roast Chicken, the pouches are tear open and zip-lock sealable, in order to cook your meal in the same retort you then eat out of. The Tandoori chicken meal includes a sachet of yogurt sauce, which needs to be removed before the boiling water goes in, and is added following the 10 minute "cooking" stage.
With that serving size, you are getting 1830kJ (437kcal) from the meal, or at 100g as a reference you are getting
The Outdoor Gourmet Company gives a 3 year "best before" on all their products but also state it is safe to eat beyond that, provided it’s stored appropriately and the packaging remains sealed. These could easily sit in a bug-out-bag or in the camping-box of a vehicle for ages without any trouble. They aren't vacuum sealed, but have limited volume and it's no big deal.
Other types of dry food might only last a year or so, but because of their exceptionally low moisture content they handle higher storage temperatures better than most wet-pack meals & higher moisture content dehydrated product. They may need a couple of cups of water to fully rehydrate, but they are delicious.
The zip seal pouch makes rubbish disposal a breeze; you just toss in any other rubbish, roll it up, zip it closed and pop it in your pack.