Turn common WIDE MOUTH mason jars and plastic 16.9oz soda pop bottles into a self watering microgreen grower. Fits wide mouth Ball mason jars. **Not the normal mouth!** Fill with water or nutrient solution, turn it upside down in a bowl, add clay pebbles (leca) and seeds, set in dark until it germinates and then give it some light. Approx 6.25" diameter. If you want to use a pop bottle in a small bowl, get the soda pop adapter which is smaller, approx 4.5" diameter. Check the bowl or dish you want to use. Made out of PLA, plant based. *Hand wash only, not dishwasher safe. *Do not leave exposed to sunlight when not in use.