A carton (10) is formed from a unitary blank of material folded to produce a hollow walled structure for encircling a main product (11). The blank is also folded to produce at least one internal divider (35) which forms a support for holding the main product (11) in position in the structure and to define within the hollow walled structure an internal volume (36) for retaining a secondary item (37). The internal divider (35) may extend transversely or longitudinally. Where the internal divider is aligned longitudinally of the housing, it may be parallel to a side wall of the carton or it may extend across a corner between two side walls. The internal divider may be provided by a pair of kick-ins. The carton (10) may be an Easter egg carton. Methods of forming and filling the carton are also described.