The Medical Supply Box is a container you search for loot, and what one holds differs from the next.
KindLoot container
Spots on the map64
Named places20
The Medical Supply Box is a container you search for loot, and what one holds differs from the next. Among other things, it can hold Herbs, Surgical Spirit, Bandage, Painkillers, Panacea and a Medkit AFAK. Searching one can turn up Surgical Spirit and Herbs, and the box in Horizon's kitchen has held Herbs and a Makeshift Heater.
The map has 64 Medical Supply Box spots. The Military Area has the most nearby, with 7, followed by the Solar Power Plant and Promenade (House Camp) at 4 each, then Sonnenberg's Clinic, the Church and House Camp at 3 each. Another 22 spots sit out in the open, away from any named place, so keep looking while you travel between them. A few boxes are stocked by hand with particular items, including Copper Ingot, Insulin Vial and Sonnenberg's sample, as well as Herbs and a Makeshift Heater.