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A lot of reviewers have stated that this hot plate does not get warm enough to keep your coffee hot. I disagree, but also think I know why they are having that experience. How well this warmer works is extremely sensitive to the shape of your coffee mug, in particular the way that the bottom is. I did some controlled experiments to determine how much heat this warmer puts into a liquid in a cup and found as much as 30 degrees of variation between different mugs of the same or similar material.
The bottom line, is that any hotplate style coffee warmer depends on maximum surface area contact with the bottom of your mug. If you have a mug that is broad and flat at the bottom, filling the heating surface of the warmer, it will work great. If you mug is very narrow at the bottom or arches up so that only the edge is touching, the heater cannot be as effective.
You should either buy a different mug, or forego this energy wasting method altogether, in favor of a well insulated stainless steel vacuum mug like the ones from Contigo. Personally, I like the taste of coffee best out of a real mug, so I continue to use this warmer, just with a broad based mug.
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I have used it for about a week and it does a nice job of keeping coffee warm at pretty much the same temperature.Update 11/21/2010: Several times now, the power light has gone off but if I jiggle it a tad bit it comes back on. It only does this once in a while but I am downgrading it to 3 stars. It still heats really well but if I have further problems I will let you know.
11/25/2010: It is becoming more sensitive to staying on and I am not sure how much longer it's gonna last!! Down grading to 2 stars instead of 1 because when it works, it does a good job.
12/17/2010: Becoming even more difficult to get it to stay on. This is a piece junk....don't buy!
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This little device has been satisfactory for my uses. I place my ceramic cup of coffee on it and the coffee remains warm but does not get hot and lose its taste. My only dislike is the switch because I don't like roller switches and I thought, from the illustrations, that what turned out to be a red light, was the on/off switch. Overall, recommended by this buyer/user.Honest reviews on Mug Warmer Mini Hot Plate Keeps Drink Perfect Temp
I love these mug warmers......no longer do I make numerous trips to the microwave to reheat coffee that has gotten cold. It will even keep a drink hot while I go take a shower and come back to it,I have purchased several for gifts.....great item!
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I've petty well worn out my cup warmer and I got this one mainly because it looked compact and also because of the price. It's ok but the on/off switch is in the cord and I just don't like that. I can't use it for work because I don't have a way to place the cord to get to the switch so I now have a cup warmer at home to use by my chair. That's pretty handy, keeps my coffe nice and hot and the cord can dangle down and be reached with no problem. It worked out well after all, but I wouldn't buy it again. It arrived in good condition and within the specified time so I have no problem with the seller.
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