A trolley system for collecting and compacting rubbish in a vehicle has a trolley housing with two chambers formed therein with respective housing openings and a rubbish compacting device. The first and second chambers, and the first and second housing openings are arranged concentrically along a main direction of extent of the housing upper side or of the housing base. The openings are arranged above the second chamber. A sliding surface is arranged below the first opening and extends from an edge of the first opening, which edge is directed towards the second opening, to an edge of the first chamber, which edge is directed towards the second chamber. The compacting device arranged above the first chamber is designed to move a pressing plate between a starting position close to the housing upper side to a position lowered in the direction of the housing base to compact rubbish within the first chamber.