How to build a 72-hour kit in one weekend

Five categories, about $300, one weekend. No prepper hobby required. By Sunday night your family will be more prepared than 90% of the households on your street.

8 min read · Published April 24, 2026

A 72-hour kit is the single best investment a normal family can make in preparedness. It covers the first three days of any emergency — the window when services are usually slowest to restore. Everything that comes after (14-day plans, whole-house power, etc.) is an extension of this core.

Here's the weekend plan we give to friends who ask "where do I start?"

Saturday morning: water (30 minutes)

Drive to a big-box store, grab 12 gallons of stored water in any food-grade container, bring it home, label each with today's date. Done. If you prefer online, the water storage guide compares four good options.

Saturday afternoon: food (1 hour)

One regular grocery trip. Here's the list:

  • 12 cans of hearty soup or chili
  • 4 cans of tuna or chicken + crackers
  • 1 jar peanut butter
  • 2 boxes shelf-stable milk
  • 1 box cereal + instant oats
  • 1 bag trail mix + 1 box granola bars
  • Manual can opener

Box it all into one plastic tote, write the latest expiration date on the top. You're now done with food.

Saturday evening: light & power (20 minutes, online)

Order the following. They'll arrive by Monday, but the order takes minutes:

  • A headlamp for every family member
  • A 20,000+ mAh USB battery bank
  • A hand-crank NOAA weather radio
  • An LED puck-light 4-pack for the rooms you use at night

Total: roughly $120. If you want to upgrade later, start looking at Tier 2 power stations.

Sunday morning: first aid (45 minutes)

A pre-built 200-piece first-aid kit is fine as a starting base. Add:

  • Adult and children's acetaminophen & ibuprofen
  • Benadryl (adult and children's)
  • Loperamide + oral rehydration salts
  • Any prescription meds your household takes, two weeks extra if possible

Store the kit somewhere central and obvious — not on a high shelf in the garage where only one person knows where it is.

Sunday afternoon: the bag (30 minutes)

Pick a backpack — any sturdy one. Pack one into it for each person:

  • Mylar blanket
  • Rain poncho
  • Change of clothes + sturdy shoes
  • Bottle of water + energy bars
  • Headlamp + spare batteries
  • Copy of ID / insurance card in a ziplock
  • $40 in small bills
  • Whistle + multi-tool

Put the backpacks near the front door where you'd grab them while leaving. Now you've got a 72-hour "shelter in place" kit AND a go-bag for each person.

Sunday night: ten-minute family meeting

Sit your family down for ten minutes. Cover:

  • Where the kit is. Where the bags are.
  • The meeting point if you can't meet at home.
  • The out-of-state contact for everyone to call.
  • "Text first, call second" rule.

Tape a printed copy inside the front door.

You're done. Seriously.

That's the whole 72-hour kit. Print the checklist version to tick off anything you missed, and set a calendar reminder for six months from now to rotate water and check dates.

What's next?

Nothing, for a while. The worst thing you can do after building a kit is go straight into "buy everything" mode. Let it sit for a month. Notice what you actually used. Then upgrade one piece at a time — a bigger power station, a gravity water filter, a second week of food. Preparedness is a habit, not a product.