What is everyone using for a cup holder in their classic?

Two all beef pattys special sauce lettuce chees pickle onions on a sesame seed bun !
We added double bacon an Cheese. and extra onions. They were pretty thick and messy. But? we were outside and could just let some extras drip and drop. Also there is the 2 second rule so no fries or onion rings were wasted. Droppings were picked back up faster then you could blink an eye.