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Prices from a Nov 11, 2026, 4:41 PM CT snapshot (America/Chicago). History starts Nov 11, 2026. We do not invent was-prices.
CostcoWarehouseNo advertised discountNon-affiliate info

Kirkland Signature Alkaline Water, 1 L, 18-count

Kirkland Signature
$12.13
Price checked Nov 11, 2026, 4:41 PM CT
No advertised discount to check — history starts collecting from Nov 11, 2026

No advertised discount to check — history starts collecting from Nov 11, 2026

Costco membership required for Same-Day.

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Truth score
Truth score —
Confidence
Low
1 observation · 1 store
Current price
$12.13
90-day median
—
90-day low / high
— / —
365-day low / high
— / —
Claimed was-price
— none advertised
Price checked Nov 11, 2026, 4:41 PM CT
In stock when checked

Price history

Only one snapshot is on file, from Nov 11, 2026, 4:41 PM CT at Costco. History starts collecting from Nov 11, 2026. We do not invent a 90-day chart.

Day one: $12.13 on Nov 11, 2026, 4:41 PM CT. Additional daily points will appear here after they are collected.

Source

Recorded source: WebFetch Costco Same-Day.

Costco Same-Day product page (sameday.costco.com), fetched 2026-11-11. Same-Day requires a Costco membership; warehouse prices may differ. Live page showed $12.13 (a search snippet earlier said $11.34; used the live page).

We do not run price-drop alerts on any product, including Amazon and Sam's Club listings.

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