4 MODES. High-quality Silicone: Made of safe, non-toxic and durable silicone, which ensures long life and easy maintenance. DUCK Design: Attractive yellow color with a cute duck motif that is sure to attract attention and delight all ages. Anti-Stress Effect: The relaxing bubble press and 'pop' sound help reduce stress and tension and improve your mood. Portable and Lightweight: Perfect for use at home, school, work or on the go. The compact size makes it easy to carry in a bag or backpack.