Brief description: Treats are frozen into bottles of water. Chimpanzees must work at getting into the bottle and will often enjoy both the ice and the frozen food inside the ice.
Materials: Plastic bottles
Assembly instructions: None required, unless individual enrichment safety guidelines require that you remove, labels, caps, etc from the bottles.
How to use: Freeze fruit, diluted juice, tea, etc into bottles of water.
Price: No cost if using recycled bottles