If you buy a bottle of Coke or Fanta in Brazil, it might come in a “universal bottle.” Ideally you’d take that reusable plastic bottle, designed to be used by multiple Coca-Cola brands, and return it ...

Ellie is an award-winning investigative reporter who has written about retail issues at Which? for more than 12 years. Refillable products are growing in popularity, but they're easy to miss on the ...