Its important to keep primates mentally stimulated to prevent boredom and stereotypic behavior. Food-based puzzles are an effective primate enrichment method. The Treat Dispenser challenges the user to manipulate the outer sliding tube to obtain the food or treat located in the inside tube dispenser. The Treat Dispenser attaches to enclosures with the Universal PES Bracket. The bracket makes it easy to insert a variety of enrichment products, like the Spinners and Wave Mirror. The Treat Dispenser provides environmental enrichment in any enclosure including animal transportation, laboratory settings, veterinary enclosures, and zoo habitats. It is a favorite primate enrichment product with curious monkeys and apes, including tamarins, capuchins, marmosets, macaques, langurs, orangutans, gibbons, and chimpanzees. All PES components are autoclavable making it easy to maintain hygiene and IACUC standards in laboratory settings.