Datrex Emergency Drinking Water
We have been using the Datrex emergency drinking water pouches in our personal emergency kits for years. The pouches are durable and can hold up to being tossed around in a backpack and best of all the water is remarkably fresh tasting.
From the manufacturers website
Datrex emergency rations, the gold standard of water rations, are individual servings of filtered fresh water, bagged in a specially designed polymer-foil sachet. To consume tear open at the mark and sip straight from the bag. The high level filtering and outer protection is certified to keep the contents fresh for a minimum of five years in even the harshest environments. USCG, Canadian Coast Guard, EC and NZ approval.