How long does it retain the heat?
812650
I used it for 30 seconds on my face, but it remains warm I belive for at least a good 3 to 5 minutes. It is not advisable to leave it much longer than that. Hope this helps.
812651
It's recommended to use for 5-10 minutes for each treatment; but I've found it'll retain heat for about 20 minutes if applied immediately. (Your body helps it retain some heat)
812652
The Eye Compress remains hot for about 5-7 minutes. A 3-5 minute treatment, 2 times per day, is typically recommended.
812653
The heat compress stays warm about 5 minutes, plenty of time to feel the effects on your eyes.
812654
Based on my experience, about 3 to 5 minutes, which according to the instructions, is what they recommend. You could get it to last longer by heating longer than the recommended 20 seconds but it becomes too hot to apply to your eyes. It works fine for me. After applying the compress I drop in a couple of drops of Tears Naturale in each eye.
1560580
It keeps it hot for 8-10 hours and warm for up to about 14 hours. I found that it helps to warm the thermos up with hot water before putting in your hot item.
17826
I have not noticed a change in temperature during the hour it stays on. I would say it is a constant heat.
881637
We don't think it retain heat any more or less than others we have had. We live in Florida and sleep with AC on 75 every night. My husband is a big man and this one gives him the support he was looking for. I personally like a softer feel. I would not buy this again.
937778
As best I can tell, it does not turn colors. I can usually feel the heat within 5-10 minutes. It can get uncomfortably hot before it times out, requiring it to be turned off.
1014657
about an hour depending on the ambient temp. It gets really warm, absorbs the body heat.It works only 'ok' in my opinion. This summer I am going to keep it in the fridge.
1651943
No, it stays cool because of the air! If it does get warm, just let the air out and put fresh cool air in.it, takes just 2 mins.
413783
Not real long. About 45 min. Maybe if you wrap plate in foil it would stay warm longer.
412676
Extremely fast. 30-60 seconds and I don't notice it losing heat as I use it.
1129981
Depends on how long you leave it in. Normally it's not hot after 5 to 6 hours inside the Thermos. You can easily take it out by hand.
2073630
I usually keep it on for 20-30 mins, and it stays plenty cold. I haven't kept it on longer so I'm afraid that's as far as I can offer information.
562961
Agree with many other responders -- stays warm for maybe 8 hours -- but definitely not hot after that. Insulation is present, but it's not like a thermos at all.
231525
Sorry I can't answer the question directly. I needed it as a cold pack after shoulder surgery and it did not stay cold more than 1/2 hour. I can only assume it has the same result for heating. But, with heating you can reheat in a couple of minutes, where-as freezing takes hours.
9701
It might depend on the setting, but I've been able to let it heat up 20-30 mins and use it approximately 30 mins with no problem.
1313327
Depending on how hot your water that you put in it is, anywhere from 20 to 30 minutes and it's still warm, then.Very nice product, we bought two of them. It's very malleable.
2208629
I prefer to heat mine with boiling water because heat retention is much greater. The heat lasts easily 40-45 minutes.
1984600
How long can I leave this on for at a time? and Does it keep the contents hot/warm?