Process for utilizing dual use packaging

A process is disclosed for utilizing dual use packaging, particularly ornamental packaging containing a pet-related product as would be used with an aquarium. The ornamental container is filled with a pet-related product such as fish food. The fish food is selectively dispensed from the container until depleted. The container is then utilized as a decorative ornament in an aquarium. Ballast may be added to the ornamental container before being submerged in the aquarium. The ornamental container may resemble a lighthouse, a treasure chest, a rock sculpture, a wall block, a submarine, or a vase.