Prepared, not scared · Prices checked Nov 1, 2026, 6:03 AM ET
The cheapest day of eating, checked daily.
We rank emergency food by what a full 2,000-calorie day really costs, water filters by cost per gallon, and we watch 2,071 products from 19 brand stores so you can tell a real deal from a dressed-up one.
The Bunker Index · Top 10
Cost per 2,000-calorie day, in stock, at today's brand-store prices. 95 foods ranked.
Prices are the brand stores' own. Renogy and Fenix Store: "Buy" goes to that store. Others: "Compare on Amazon" is an Amazon search, and Amazon's price may differ. Paid links.
💧 Water Index cost per rated gallon
| Rank | Filter | $ / gallon | Price | Rated | Brand's wording |
|---|---|---|---|---|---|
| #1 | Puribag Micro - Mini membrane water filter Uncharted Supply Co In stock | $0.0174 | $22.99 | 1,321 gal | "Filters up to 5,000 litres of water" Note: 5,000 L converted at 3.785 L per gallon |
| #2 | Puribag Pro - Membrane Filter Kit Uncharted Supply Co In stock | $0.0227 | $29.99 | 1,321 gal | "providing up to 5,000 liters of treated water, depending on water turbidity" Note: 5,000 L converted at 3.785 L per gallon |
| #3 | LifeStraw Peak Series Straw Echo-Sigma In stock | $0.0300 | $29.99 | 1,000 gal | "Long-lasting membrane microfilter will last up to 4,000 L (1,000 gallons) of water" |
| #4 | Puribag Pro Portable Water Purification System Uncharted Supply Co In stock | $0.0492 | $64.99 | 1,321 gal | "The PRO SYSTEM amplifies the Puribag's capacity from up to 120 liters to an impressive 5,000 liters" Note: 5,000 L converted at 3.785 L per gallon |
| #5 | Big Berkey Stainless Steel Drip Filter System - 2 Black Berkey Filters (approx. 6000 gal.) Legacy Food Storage In stock | $0.0645 | $387.00 | 6,000 gal | "These high capacity filters provide up to 3000 gallons per filter, and 2 are included" Note: Two filters at up to 3,000 gallons each |
🧭 Browse 2,071 products 13 categories
📉 Brand-listed markdowns today Deal Meter warming up
These are the biggest gaps between today's price and the brand's own "compare at" price. Our Deal Meter checks whether a sale is real by comparing today's price with each product's own 90-day median. Our history started Oct 17, 2026, so verdicts switch on after 14 days of data. Until then, treat "was" prices with healthy suspicion.
WiseFire 1 Gallon 60 Cup Fuel Source
$5.00CREAMY POTATO - Soup Mix
FROM $4.99CHEDDAR POTATO - Soup Mix
FROM $4.99VEGETABLE BEEF Flavored - Soup Mix
FROM $6.00Self Heating Kit - Spicy Asian Style Noodles + Snack Bundle
$15.00Self Heating Kit - Lasagna with Sausage + Snack Bundle
$15.00Self Heating Kit - Pasta Alfredo with Chicken + Snack Bundle
$15.00Self Heating Kit - Coconut Blueberry Multi-Grain Cereal + Snack Bundle
$15.00Black Friday · Friday, November 27, 2026
The Prepper Prices Black Friday Tracker
We've been recording prices since Oct 17, 2026, so by Black Friday we'll know each product's normal price and can call out the fake sales. The live deals page opens November 1.
🏷️ Cheapest right now 40 live rankings ·
Cheapest survival kits and bug-out bags
from $29.99Lighting & FlashlightsCheapest headlamps right now
from $6.50Freeze-Dried & Long-Term FoodCheapest emergency food buckets, per day of eating
#1 today: $10.99 per 2,000 kcal dayPower Stations & SolarCheapest solar panel per watt
#1 today: $0.911 per wattWater Storage & FiltersCheapest water filter per gallon right now
#1 today: $0.0174 per rated gallonFreeze-Dried & Long-Term FoodCheapest freeze-dried food per serving
#1 today: $0.211 per servingPower Stations & SolarCheapest power station per watt-hour
#1 today: $0.27 per WhFreeze-Dried & Long-Term FoodCheapest #10 cans of freeze-dried food
#1 today: $0.211 per servingAll 40 "cheapest" rankings → Price drops this week → Brand vs. brand → Seasonal price watch →
📚 Popular guides
Cheapest emergency food per calorie
Buckets, pouches and bars, ranked daily.Checklist72-hour kit checklist
Ready.gov's list with today's prices.PlanningFood storage for a family of 4
3 days to a year, priced.PowerBudget power stations per watt-hour
Station-only prices, brand-stated capacity.How it works
We check prices daily
One polite request per brand store per day, using each store's public product feed. No logins, no tricks.
We do the math
Price ÷ (total calories ÷ 2,000) = cost per day of eating. Calories come from the brand's own page, quoted with the source named.
You spot the real deals
The Deal Meter compares today's price with the product's own history, not with a made-up "was" price.