Some people carry both, but most choose one or the other. Multi-tools are nice for everyday utility like opening a bottle or fixing a screw on your sunglasses. There are tons of great options from popular brands like Leatherman and Gerber. But as in most things, the 80-20 rule applies here, and you’ll find that you won’t use most of the features in the extra-gadgety options and should avoid the unnecessary weight.
When doing a mixed container, I put the Ziploc bag with various condiments from Taco Bell and other places, salt, pepper, hot sauce soup mixes and lots of things which can be put in the cracks and crevices in there. Also, put in the Ziploc with matches( in a small spice bottle) a couple of boxcutters and a manual can opener. Sam’s had tomato sauce, crushed tomatoes, etc. for three dollars and change per #10 can.
@Cycloneous: Learning any martial arts skill takes years. Too many dojos promote people in order to keep them coming back. Elvis Presley was supposed to hold black belt ratings in several different martial arts. I strongly suspect that if he were to engage in a match with even a first class brown belt in any of those disciplines he would have gotten his butt royally kicked.
Thanks for the comment Thomas. Just curious, how do you cook with your dehydrated mushrooms? I like to use frozen vegetables and dehydrate them. Frozen carrots that are cut into the circles dehydrate down to about the size of a pencil eraser. They plump up nice when rehydrated and you can’t tell the difference. Some veggies seem to work better than others.
9. Cash.  This isn’t exactly a product, but without a supply of cash during an emergency, you and your family could be left high and dry.  Set aside some cash each month, in smaller bills, and have it ready to grab if you must ever leave your home in a hurry due to a natural disaster or some other crisis.  Figure on having enough to pay for 7 nights at a hotel, 3 or 4 tanks of gas, and enough to pay for a week’s worth of food and other supplies.
There wasn’t much weather tracking prior to the late 19th century. Certainly, some individuals kept track of the weather as best they could locally, but it wasn’t organized into a regional or national scale perhaps until the mid 20th century. I am reading about the great desolation of the 1930s in the Eastern Colorado, Western Kansas, Oklahoma panhandle, North Texas area and even in the 1930s weather tracking was at best primitive. Dust storms came as big a surprise to the weather bureaus of the region as it did to the farmer on the ground.

Mainstream economist and financial adviser Barton Biggs is a proponent of preparedness. In his 2008 book Wealth, War and Wisdom, Biggs has a gloomy outlook for the economic future, and suggests that investors take survivalist measures. In the book, Biggs recommends that his readers should "assume the possibility of a breakdown of the civilized infrastructure." He goes so far as to recommend setting up survival retreats:[53] "Your safe haven must be self-sufficient and capable of growing some kind of food," Mr. Biggs writes. "It should be well-stocked with seed, fertilizer, canned food, medicine, clothes, etc. Think Swiss Family Robinson. Even in America and Europe, there could be moments of riot and rebellion when law and order temporarily completely breaks down."[23]

30. Paper goods, plates, cups, utensils – In addition to the above, having a nice stock of paper plates, cups, and utensils will be extra convenient. Next time you see a super sale on these items at Costco’s or Sam’s try to shoot for a 1 month supply. These can always be used in a short-term crisis, as well as for the first month in a long term to eliminate washing while other critical things needs to be done.
For example, have you considered the need for feminine products?  What about canes, walkers, and manually operated wheelchairs?  Pets need food, crates, and toys to keep them occupied while the rest of family members are recovering from chaos.  It will be impossible to cover every contingency but be aware of what those needs are now then prioritize those that you deem most important.
And not everyone is rational. The prepping movement contains overzealous elements, particularly in the US, where natural disasters are bigger and badder and, well, the guns. But those signed up to the movement in the UK are like you and me: relatively normal, with the odd quirk. They just keep a half-tank of petrol in the car at all times, and at least a month’s worth of food, and an alternative way to heat their homes in winter if the gas goes down.
For survival purposes, think calories, not meals per day. An adult will require between 2,000 and 2,400 calories a day nominally, and more if they are active. Children require less, but the effects of malnutrition and starvation hit them harder. You can live for quite a while on reduced calories to make your stores go further, but your activity levels in the aftermath depending on what is required of you may dictate high calorie consumption. Plan accordingly before you hit “rationing” levels of supply.
Shields said that the company noticed an uptick in sales in the months leading up to the 2016 presidential election, and, again last year, amid fears of nuclear escalation with North Korea. Like Wise Company's former CEO Aaron Jackson, whom Bloomberg previously dubbed “America’s Survival Food King,” Shields said he likes to think of Wise’s products as “an insurance policy.”