One grande mocha crappuccino, please.

A new BBC watchdog report has revealed that London’s three big coffee chains — Caffè Nero, Costa and Starbucks — all have concerning amounts of fecal bacteria in their ice.

While contaminated ice cubes might not, at first, seem like a major dilemma for a piping hot java chain, US-based chain Starbucks recently forecasted that 50 percent of its beverage sales will be cold drinks by 2021.

For Starbucks and Caffè Nero, 30 percent of the investigators’ samples contained fecal coliforms, bacteria that can increase a person’s chances of contracting a water-borne illness. Seven out of 10 Costa samples were contaminated.

A spokesman for Starbucks told the BBC the company is taking the report “extremely seriously,” and is currently conducting an internal investigation.