The Dr. Brown"s Training Cups feature a Sip Activated Valve that is only activated by baby"s mouth when drinking; there is no mess when baby is not drinking from this spill proof cup. All parts in Dr. Brown"s Trainer Cup System are interchangeable and come in mixed colors of bright yellow, purple, green, blue and berry pink. The hard spout is ideal for teething babies. Cups are BPA free and dishwasher safe (top rack only). Contents include: 9oz/270ml cup, sip activated valve, hard spout cap, removable handles, protective lid and instructions.