A luggage item (100, 200, 300) for use in luggage system comprising a luggage trolley and another luggage item (350, 532), the luggage item (100, 200, 300) comprising - a first side, - a second side being opposite the first side and being separated by flanks (102, 115, 116, 117) from the first side, the first side and the second side having an area larger than the areas of the flanks (102, 115, 116, 117), - a first coupling element arranged at the first side, - a second coupling element arranged at the second side for engaging with another coupling element of the another luggage item (350, 532) to releasably attach the another luggage item (350, 532) to the luggage item and/or for engaging with a trolley coupling element of the luggage trolley to releasably attach the luggage item (100, 200, 300) to the luggage trolley, wherein the another coupling element of the another luggage item (350, 532) is similar to the first coupling element, wherein the first coupling element comprises two first coupling profiles (202, 204, 306, 308) each comprising a first groove (305, 397), a first surface and a second surface, the first surface and the second surface face the first groove (305, 397), when the first coupling element engages with a further coupling element of another luggage item (350, 532), the first surface is for limiting a relative movement of the another luggage item (350, 532) with respect to the luggage item (100, 200, 300) in a first direction and the second surface is for limiting a relative movement of the another luggage item (350, 532) with respect to the luggage item (100, 200, 300) in a second direction being different from the first direction, the openings of the first grooves (305, 397) face away from each other, each opening faces into a direction of one of the flanks (102, 115, 116, 117). - a first side, - a second side being opposite the first side and being separated by flanks (102, 115, 116, 117) from the first side, the first side and the second side having an area larger than the areas of the flanks (102, 115, 116, 117), - a first coupling element arranged at the first side, - a second coupling element arranged at the second side for engaging with another coupling element of the another luggage item (350, 532) to releasably attach the another luggage item (350, 532) to the luggage item and/or for engaging with a trolley coupling element of the luggage trolley to releasably attach the luggage item (100, 200, 300) to the luggage trolley, wherein the another coupling element of the another luggage item (350, 532) is similar to the first coupling element, wherein the first coupling element comprises two first coupling profiles (202, 204, 306, 308) each comprising a first groove (305, 397), a first surface and a second surface, the first surface and the second surface face the first groove (305, 397), when the first coupling element engages with a further coupling element of another luggage item (350, 532), the first surface is for limiting a relative movement of the another luggage item (350, 532) with respect to the luggage item (100, 200, 300) in a first direction and the second surface is for limiting a relative movement of the another luggage item (350, 532) with respect to the luggage item (100, 200, 300) in a second direction being different from the first direction, the openings of the first grooves (305, 397) face away from each other, each opening faces into a direction of one of the flanks (102, 115, 116, 117).