Automatic Watering Bulbs, Decorative Garden Watering Bulbs, Plant Watering System: 6-piece automatic watering ball, 1 year warranty and 100% customer satisfaction guarantee. 3 Sets of 2 in. diameter globes, each dose of water is 0.44 liters. Each can lasts 3 to 4 weeks and up to 12 months with normal use. Serve your plants 24/7 with these beautiful water cans that also add an elegant touch to your patio or garden area.