Sprouting Set with Jar, Seeds and LidMason Jars are the perfect vessel for growing Bean Sprouts because their clear walls allow for light to easily pass through and they can be sterilized in the dishwasher between sprouting batches. The Bean Screen screws onto the mouth of wide mouth Mason jars and provides an anti roll feature via the faceted sides, preventing the jar from rolling off counter tops. The Bean Screen also has pegs so the jar can be left upside down for optimal drainage.