Qualarc Drip Drop 2 Self Watering Shatter Resistant Acrylic Globes for Plants/Pots, 4.5"/Large, Red/Yellow Made of shatter resistant acrylic material. Larger than most holds 1.5 cups of water Easy to use Water your plants as usual then fill and insert drip drop Liquid fertilizer may be added to water Take the guess work out of watering no more over or under watering Eliminates worry about leaving your plants unattended Larger tip helps prevent clogging For best results pre drill hole in soil with a pencil so tip doesn't clog For indoor and outdoor use Watering lasts for up to 2 week or until refilled