El Nino Watch
The cheapest to the dearest listing seen on the date shown, for the quantity on your checklist rounded up to whole packs. Indicative only: prices change and delivery is not included.
Preparedness
Each price was read by hand on a shop page on the "checked" date and saved with its link. Nothing is scraped live (Lazada and Shopee forbid it, and a wrong live price is worse than a dated, sourced one).
For your household, every listing is turned into a cost: packs needed = your quantity divided by what one pack holds, rounded up; cost = packs x pack price. The range goes from the cheapest listing to the dearest.
Example: 112 L of drinking water (2 people x 4 L x 14 days). 6 L bottles at 35 THB need 19 bottles = 665 THB; 9 L packs (6 x 1.5 L) at 40 THB need 13 packs = 520 THB.
"4.44-6.33 THB per L" is a unit price (price per litre); "520-722 THB" under "For your household" is what your quantity costs. A price marked "marketplace seller" came from a Lazada or Shopee seller listed on Priceza: it varies more, and fakes are more likely.
A range is more honest than one number: the same item can cost several times more from a premium brand or a small seller. Plan with the upper value if you want to be sure.
Food per person-day uses a stated assumption (for example 3 cans of fish per person per day); it is shown under the item.