Drive-Thru Drink Danger - McDonald's, Philadelphia Pennsylvania

1601 South Christopher Columbus Boulevard, Philadelphia, 19148 Pennsylvania, United States

At 10:47am on 02/02/2020 I ordered from the drive thru a sausage egg and cheese biscuit meal with an extra hashbrown and a medium coke.
I ate the first hashbrown. No problem. Delicious.
Put the straw in the cup and took 3 pulls on the straw and IMMEDIATELY I knew I was poisoned. I had to vomit! Dry-heaved a fee times and put my finger down my throat and proceeded to vomit for 10 minutes+/-.
What was in that cup? I dont know. Cleaning products maybe? AND I'm scared to think what else | Symptoms: Nausea, Vomiting, Other