They work. I've used them on veggies like sweet potatoes and mushrooms. These weights are bigger than expected and heavier so they definitely work - maybe too much for what it takes, but they work. I wish they were a little smaller or offered a smaller size. With mushrooms or smaller foods, it's just difficult not to have weight and crush the food when the air is removed. You must use the water displacement method and set the weight first. But other than that, they're easy to clean, and as far as I can tell or see, they don't affect the taste of the food in the bag.
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