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198 requests
Product Description
Keep your beverages hotter for longer without springing for an ugly mug or thermos with these double-wall cups from JoyJolt. Available in two sizes, in sets of two or four, the cups feature a double-wall insulated construction of borosilicate glass Read More
These would generally keep my drinks warm/colder for longer than a traditional mug but they were way too fragile. One of them shattered within the first two weeks when I was doing the dishes and a spoon slipped out of my grip and smacked the upper lip of the mug. The other lasted much longer but likely because I was more conscious of it's fragility. It eventually shattered when I went from filling it with a cold beverage to a hot one too quickly.
I love these mugs. Look And work great. I actually did a head to head test with these mugs vs standard cups. Using a very accurate thermometer I measured the temperature at different time intervals in both cups. After 10 minutes the coffee in these insulated mugs was 10° higher than in the standard mugs. Science always wins.
The only reservation is that due to the shape of the inside of the cup, you have to alter the way you drink or you will spill the beverage on yourself. It's a minor adjustment and worth making for the benefit of having contents stay warm longer.