This is scary, 2 couples found dead at Evia (daang hari) parking lot. Vomit found inside the car, police said their esophagus was burned. 2 receipts were found. Sausage McMuffin from Mcdo Macapagal Blvd and Slurpee from 7-11 Alabang.

Reminds me of the milk tea poisoning, Kung burned esophagus, I'd say the poison is liquid. Although it didn't mention kung may drinks sila from McDo. But then again, the timeline suggest na mas suspect yung Slurpee.
Couple’s death probed thru food, drinks receipts | Inquirer News