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Title: Canisters do not hold a seal
Review: I agree with the other reviewer here. We received this as a gift. The canister seals initially but loses the seal after about 30 minutes. We tried it about a dozen times and it did the same thing each time. It was like this right out of the box. We tried washing it and it didn't make a difference. When we returned it to the store there were others there on the shelf that had obviously been opened and returned. We bought the Foodsaver brand which was more expensive but works great.
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