Costco's Milk Mystery: Why Your Carton Might Be Spoiling Faster Than Expected
Costco milk spoiling early? Experts explain why

Shoppers across the UK have raised concerns over Costco's milk spoiling well before its printed expiration date, sparking debates about supermarket storage practices and supply chain integrity.

The Sour Situation

Multiple customers report opening seemingly fresh Costco milk only to find it has already curdled or developed an off-putting odour. "I bought three bottles last Tuesday, and by Friday they were all bad - a full five days before the expiry," complained Manchester resident Sarah K.

Possible Causes

Food safety experts suggest several potential factors:

  • Temperature fluctuations: Milk is highly sensitive to temperature changes during transport
  • Extended storage times: Larger warehouse quantities may mean longer shelf time before purchase
  • Packaging variations: Different suppliers might use slightly different preservation methods

Costco's Response

While Costco hasn't issued an official statement, store employees recommend:

  1. Checking milk temperature in the store's fridge section
  2. Examining packaging for any damage or bloating
  3. Reporting spoiled products immediately for replacement

Consumer Protection

The Food Standards Agency reminds shoppers that they're entitled to replacements or refunds for goods not lasting as long as reasonably expected. "If your milk spoils prematurely, keep the receipt and contact the retailer," advises FSA spokesperson James W.