the price-per-unit x-ray machine

Cheapest Beverages Staples Per Unit

As of September 2026 · 6 staples tracked monthly across Amazon, Walmart & eBay

The best value per unit on every beverages staple we track, ranked by what things actually cost — not what the shelf tag wants you to feel.

Cheapest right now

StapleBest valueRetailervs last monthPack trap?
Protein Shake8.3¢ per fl ozeBay▼ −27.6%⚠️ yes
Electrolyte Powder85¢ per ozAmazon▲ +10.3%⚠️ yes
Energy Drink6.8¢ per fl ozeBay▲ +27.1%⚠️ yes
Zero Soft Drink3.1¢ per fl ozeBay▲ +108.8%⚠️ yes
Soft Drink1.5¢ per fl ozeBay▼ −1.4%—
Sparkling Water1.5¢ per fl ozeBay▼ −41.0%—

Full leaderboards, 12-month trends and the pack-size math live on each staple's page.

Quick answers

Is the biggest pack always the cheapest way to buy beverages staples?
Not this month. 4 of the 6 beverages staples we track had a pack-size trap in September 2026 — the largest pack was not the lowest cost per unit. Check the per-unit math before assuming bulk wins.
How often are these numbers updated?
Monthly. This page was generated on September 1, 2026 from live Amazon, Walmart and eBay listings. Prices move between updates, so use the live PriceXray search for today's numbers.

Explore

Our Amazon links are plain links — no affiliate tag, no commission.

Amazon doesn't allow affiliate sites to run price alerts, so we chose the alerts. If eBay or Walmart links ever earn us a commission, they'll be labeled (paid link) — and it never changes the price you pay.

Prices checked September 1, 2026. Prices change fast — treat this page as a map, not gospel, and YMMV. For today's numbers, run a live search.

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