Title: Great concept - poor execution
Product review: The idea of vacuum sealing coffee to keep it fresh is great. However, this canister creates a vacuum that lasts for an hour or two and then is gone. There is a button that will allow it to automatically renew the vacuum every 12 hours. However, that leaves the coffee without a vacuum for the bulk of the day. I could have gotten a silver-colored canister with an air-tight lid for about $5 and saved a lot of money. This is not a worthwhile purchase!
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