Do herb keepers really work?
Within 15 days, all the basil stored in keepers on the counter had turned brown, wilted, or developed a fuzzy coating. By comparison, after 50 days of careful pruning and water-changing, there were still a few usable green leaves in the Mason jar, also stored on the counter. Cilantro and thyme stayed fresh in the refrigerated herb keepers for at least 46 days. The test kitchen method also turned in impressive numbers, maintaining these two herbs for 40 and 46 days, respectively.
When it came to evaluating the herb keepers that held the refrigerated herbs, our winner slightly outperformed the competition. Its design may have contributed to this success, as it was the only model with vents; there are L-shaped openings in each corner of the lid. Our science editor explained that these vents may be advantageous because they can help reduce humidity and condensation, which in turn reduces the risk of fungi prospering and infecting the leaves.
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