These ceramic plant helpers make watering delicate plants easy, keep sensitive leaves dry and help avoid over watering plants in closed pots. They are designed to gently drip just the right amount of water (2, 5 or 6.5 oz) over 30 min to about an hour. Created by Peruvian clay artist Bernardino who enjoys making wild patterns using a technique similar to the Japanese water marbling. Birds come assorted. Color patterns vary.