What did Katniss receive in the silver bag?

Katniss receives balm for her tracker-jacker stings.

Sitting on my sleeping bag is a small plastic pot attached to a silver parachute. My first gift from a sponsor! Haymitch must have had it sent in during the anthem. The pot easily fits in the palm of my hand. What can it be? Not food surely. I unscrew the lid and I know by the scent that it’s medicine. Cautiously, I probe the surface of the ointment. The throbbing in my fingertip vanishes.