I have now developed a family emergency food kit - which always goes in the car if I'm making a long trip. I'll be glad of it this winter. It consists of:
4 x Bagels - Aldi specials with long expiry sealed in heavy duty plastic
6 x Cereal Bars
4 x Packet Cous Cous ready meal type sachets
2 x Packets Tuna in foil packs
1 Mattessons Smoked pork Sausage
Peanut Butter in plastic jar
Salt/Pepper combined thingamajig
Tea
Coffee
Whitener
Hot Chocolate sachets for kids
Tomato Soup sachets
4 x Sporks
1 x Tin 58 pat mug
2 x melamine cups
Swedish army mess kit and alcohol stove
Spare fuel
Fire stick
Swan Vestas
Pan Grip
Lock knife
Water Filter + Suplies
This all packs into a 10 litre PLCE side pouch and should be enough to keep a family of 4 going comfortably for at least a day, although I haven't calculated total calories yet.