Map Stamp
Stamps are an item for purchase in the Mann Co. Store. When purchased, the proceeds go "directly to hard-working Team Fortress 2 map makers". Upon purchasing a stamp, you will receive the World Traveler's Hat which will show a particular effect on the map that corresponds to the stamp you bought. Current stamps available for purchase are Coldfront, Egypt, Fastlane, Freight, Harvest, Hoodoo, Junction, Mann Manor, Mountain Lab, Offblast, Steel, Turbine, Watchtower and Yukon