An overwrap for at least one pot provided with an upper pot part bordered by an outwardly projecting peripheral flange, said peripheral flange comprising a top face, a bottom face, and a side edge, said top face and bottom face defining between each other the thickness (e) of said peripheral flange, said overwrap comprising a tray, made of cardboard or a similar material, provided with an upper tray face and a lower tray face delimiting between each other a tray thickness, said overwrap comprising at least one receiving housing formed into said tray thickness and adapted to receive and hold said peripheral flange of a pot by elastic fitting, said at least one receiving housing comprising a housing bottom adapted to constitute a stop on the side of said top face of the peripheral flange of said pot, and a housing opening opening in said lower tray face, said housing opening comprising at least two lock pins arranged in protrusion on the periphery thereof, remote from said housing bottom, said lock pins being adapted to come opposite the bottom face of said peripheral flange, after elastic fitting of said peripheral flange within the receiving housing thereof, characterized in that said tray comprises three layers of material superposed and secured to each other: - a top layer, a face of which forms said housing bottom of said at least one receiving housing, - a bottom layer comprising said housing opening with said lock pins, and - an intermediate layer, arranged between said top layer and said bottom layer, said intermediate layer comprising an opening for forming said at least one receiving housing and has a thickness (c) that is higher than the thickness (e) of said peripheral flange. said overwrap comprising a tray, made of cardboard or a similar material, provided with an upper tray face and a lower tray face delimiting between each other a tray thickness, said overwrap comprising at least one receiving housing formed into said tray thickness and adapted to receive and hold said peripheral flange of a pot by elastic fitting, said at least one receiving housing comprising a housing bottom adapted to constitute a stop on the side of said top face of the peripheral flange of said pot, and a housing opening opening in said lower tray face, said housing opening comprising at least two lock pins arranged in protrusion on the periphery thereof, remote from said housing bottom, said lock pins being adapted to come opposite the bottom face of said peripheral flange, after elastic fitting of said peripheral flange within the receiving housing thereof, characterized in that said tray comprises three layers of material superposed and secured to each other: - a top layer, a face of which forms said housing bottom of said at least one receiving housing, - a bottom layer comprising said housing opening with said lock pins, and - an intermediate layer, arranged between said top layer and said bottom layer, said intermediate layer comprising an opening for forming said at least one receiving housing and has a thickness (c) that is higher than the thickness (e) of said peripheral flange. - a top layer, a face of which forms said housing bottom of said at least one receiving housing, - a bottom layer comprising said housing opening with said lock pins, and - an intermediate layer, arranged between said top layer and said bottom layer, said intermediate layer comprising an opening for forming said at least one receiving housing and has a thickness (c) that is higher than the thickness (e) of said peripheral flange.