PROFESSIONAL USE. Also chose by officials in sports, teaching, animal training, police authorities, military units and music specialists. STORAGE. Ensure whistle is clean and dry before storage. Store out of direct sunlight. MADE IN THE UK. Whistles are designed and made by specialists with over 150 years of experience in the United Kingdom. CLEANING INSTRUCTION. Always ensure whistle is clean and free from dirt. Clean with warm water mixed with a small amount of disinfectant. Dry thoroughly with a clean lint free cloth.