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after a while the seals wear out , and start to leak, it seems like seals are different on each mug.
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It was packaged broken, the seal was missing a big chunk of plastic, creating a sharp edge and making the mug completely unusable
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There is a good silicone seal in the lid that seals well enough to keep things cold
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The lid seal is MUCH better, and unless you turn the mug completely on its side, or upside down, there is minimal spillage.
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because it has a good seal, it doesn't run down the front of you.
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I must admit, to open and close the top is difficult if you are arthritic, but the seal is strong and the mug will not leak if you have closed it properly.
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I purchased the cup for someone else as well as
