Abstract: Stackable box for receiving objects, provided with a bottom, whether or not detachable, and upright side walls comprising side and transverse walls which join each other in corner points, the box being provided with detachable extension pieces having legs extending upwardly from the side walls, each extension piece also being provided with a pair of wings, each wing extending parallel to the side walls joining each other in a relevant corner point and taken up at least with their bottom ends in recesses made in said side walls.

Abstract: A rectangular or square stackable plastic carrier, more particularly a plastic crate, comprises a support bottom part 1 formed of a bottom 2 with an upright edge 3 at its periphery.Corner columns 4 are able to fit at their top end and bottom end respectively, into the bottom and top side of a carrier disposed thereon and therebeneath.The length H of the corner columns is a multiple of the height h of the bottom part 1.The external distance L.sub.1 between two opposite set-back sides 5 of the bottom part 1 is substantially equal to or less than the internal distance L.sub.2 between two corner columns measured between the same opposite set-back sides 5, said set-back sides being provided with a handle 6. The set-back part 5 corresponds to the transverse dimension of a corner column. In the space between two corner columns 4 and the set-back part 5 free ends of corner columns of a carrier being therebeneath in a staggered relationship, may be received.