Wow I had originally given this thing five stars and worte: "So stupid, but little thing brings me so much happiness, it's a solution so perfectly calibrated in cost and function to the problem it solves."But now it just stopped working.
If you're not gonna use a Contigo or you sip too slow out of your mug, this thing is winner
You are reading snippets from reviews of Norpro 559 Electric Immersion Heater Warmer 300W For Water Tea Coffee Soup
I used it twice for about 5 minutes each time warming up a cup of water
Had my cup boiling and ready to go in just a couple of minutes
After the water boils for about a minute, the water temperature is fairly well distributed throughout the entire cup of water and the cup is very hot to the touch due to rolling boiling water.
The motion of the rolling boil allowed me to put a metal coffee filter at the bottom of the cup and cook the coffee in the cup with the rolling boiling water agitating the grounds enough to make a great tasting cup of coffee.
Been using it for a couple weeks to enjoy a hot cup of coffee during this deployment without having to buy a coffee every day
It does exactly what you need it to do - make hot water.
I need a low power solution, since I'm using this on an off-grid solar system and I got the time to wait, but I can't afford to burn up power at 3x+ the rate for other options (like coffee pot or microwave over, or induction burner for a single cup of hot water).
I also use it to boil water in a small Japanese cast iron teapot
I use it for travel and wish that it had a holder to set it on after taking it out of the hot water
I needed a heater to warm up the water in my aquarium to 120F to kill black beard algae that has taken over the fish tank
And if you fill it at the upper end of the limit, the cup is a bit over-full and tents to splash out a few spots of water when reaching a rolling boil.
Takes 10-12 oz of water to a rolling boil in five to six minutes
With a digital thermometer, I measured the temperature of the water on the surface at a rolling boil at about 198 degrees F, but I'm at high altitude (about 5100').
The water maintains a rolling boil once the water boils.
The water started to get hot in a minute, very hot in 3 minutes, and rolling boil in 7 minutes