As of July 2026 · 85 listings tracked across Amazon, Walmart & eBay
Right now the best value is 2.5¢ per fl oz — Clear American Fuji Apple Sparkling Water, 33.8 fl oz (33.8 fl oz, $0.84) on Walmart. See it on Walmart →
Prices change fast and stock disappears faster — YMMV.
The pack-size trapThe biggest pack we tracked (405.6 fl oz) looks like the bulk play, but it runs 6.5¢ per fl oz — the 33.8 fl oz pick wins at 2.5¢ per fl oz. Bigger isn't automatically cheaper.
Median across all 85 tracked listings: 7.5¢ per fl oz. The worst deal we saw ran 54¢ per fl oz — same product category, 21.7× the price per unit.
The 12-month picture
This is our first month of tracked history for Sparkling Water — the trend line starts here.
Lowest we've ever tracked: 2.5¢ per fl oz (July 2026).
How we figure this out
Once a month we pull live Sparkling Water listings from Amazon, Walmart and eBay, read the honest quantity out of each one (fl ozs, in this case — the unit that actually matters), and divide the real price by it. Coupons that change what you'd pay today are applied; "subscribe & save" teasers are not. Then everything gets ranked by cost per fl oz, because a big box with a small number inside is still a small number.