I have used about 6 or 8 rolls of this packaging material and am very happy with its performance. It will burst and lose air if you try to use it with jagged materials (like rice). For this you will have to leave it in the plastic bag that comes with the kit and vacuum it in your bag. This is the only downside to these pouches, but I would expect that to be the case with any of these vacuum pouches unless I downgrade.
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