magic suitcase
n.— «If nothing changes in the race between drug-takers and testers, the takers will always be a clear length ahead. Refrigerated lorries, magic suitcases, all these little secrets have been discovered. Other ways and means have supplanted them. Unmarked cars waiting at cyclists’ hotels, camper vans with fridges full of capsules hidden among the jam pots, yoghurt and mozzarella.» —“The bottle hit the floor and the excrement hit the fan” by Frank Keating Guardian (U.K.) July 8, 2002. (source: Double-Tongued Dictionary)