It seems that along with the CV90, the Swedes packed our fighters a couple of cans of surströmming.

For those that don't know:

Surströmming is lightly salted fermented Baltic Sea herring traditional to Swedish cuisine since at least the 16th century. Surströmming or fermented herring is distinct from fried or pickled herring

You're also supposed to open it underwater:

https://visitsweden.com/what-to-do/food-drink/swedish-kitchen/fermented-herring/

How to eat surströmming like a local: As the tin is pressurised, open the surströmming in a basin of water. Wash it, gut it, and wrap it in buttered 'tunnbröd' (a type of sweetened flat bread) with slices of almond potatoes and diced onion. Accompany with beer, snaps and lots of friends.

Load it on a UAV and drop it on enemy lines!