Aqua Globes Mini- Set of 3 The work of art that waters your plants for you! New size for smaller plants. Take the guesswork and worrying out of watering! How much water should a plant get? Sometimes it’s hard to tell, but not with Mini Aqua Globes watering bulbs. As soil becomes dry, it releases oxygen into the Mini Aqua Globe watering bulb, which in turn releases the exact amount of water your plant needs. Waters plants perfectly for up to 2 weeks. Individually crafted hand blown glass.