Package containing water-soluble capsules

A package comprising at least one layer of biodegradable material and containing a plurality of unit dose products, at least one unit dose product comprising a detergent composition comprising hydrogenated castor oil within a sealed compartment formed by a water soluble film, wherein the at least one layer of biodegradable material is paper-based with a weight average fibre length of cellulose in the paper is at least 2 mm, the package includes co-operating lid and base members, the base members includes a leak resistant barrier material, the lid includes side walls, and the side walls include an outer surface coated with a water-based barrier material, and the package has a pair of opposing long walls, each long wall having a zone which is configured to be pressed to disengage a child proof locking mechanism and enable the lid and base members to be separated.