There is disclosed a method of filling a capsule for a water pipe with a consumable product. The consumable product has a mixture of a solid and liquid components arranged to be vapourisable in use. The consumable product mixture is de-agglomerated or rarefied for insertion into the capsule. The capsule is filled with a predetermined amount of the consumable product and sealed with the consumable product mixture therein. The consumable product may be compressed or compacted into the capsule and may substantially fill the capsule to achieve a predetermined density. There is disclosed an associated capsule product for use in a water pipe.