For larger plants or tropical ones that like much more water, the Blumat Classics and Bottle adapters provide the same ideal water supply as their smaller version giving about 50% more water. The Classics vary with height of water container and the Bottle adapters release about 10 ounces of water per 24 hours.
For bottle adapters:
Cut the bottom off plastic bottle and fill for automatic watering. This adapter fits into almost any standard plastic bottle. To install, fill the bottle with water and push into the soil near a plant. The porous cone will slowly start to distribute water.