Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: How long does it take to warm the cups? (i.e. for that unplanned cup of coffee)
Document: I prefer to drink my coffee in thick walled ceramic cups (50&#8217;s Diner Style). On cold mornings my coffee would cool off too fast so I purchased the Jura Cup Warmer. It has solved my problem. Now I can take my time and enjoy a hot cup of coffee. I use the Auto On feature to start the warmer about an hour before I will use a cup since it does take it a while to get up to temperature. It also has an Auto Off feature so the warmer is not on all day.
this cup warmer is a perfect companion to any coffee machine. warm cups make a big difference in the taste of coffee. the machine has a timer. you can have the cups warm in the morning when you ready to make your morning joe. it can also be programmed to turn off at the set time.
Heating the cups makes a world of difference! It isn't a necessity but as one reviewer stated, it completes the experience. Programmable turn on and off assures the cups are warm before you make your first cup of coffee. The finish matches Jura's other products and looks nice next to the coffee machine. I have three regular mugs in each drawer and this has freed up space in the cabinets. I only wish I had gotten this sooner.
When the first cup warmer arrived, I set it up in the kitchen to heat my espresso cups. After an hour of heating, the cups felt just lukewarm. Surprisingly, they did not seem to warm enough to make any difference for the coffee. I also found that the machine had a jammed timer button, so I returned it attributing the defect to poor construction.The second cup warmer arrived intact. I set it up in the kitchen. The cups felt lukewarm again, so I checked the Jura-Capresso website; it said the cup warmer heats cups to 130 degrees Fahrenheit.
I splurged on a Jura coffee making machine about a year ago. Then I remodeled my kitchen, converting a mud room into a walk in pantry plus coffee bar. Turns out it gets REALLY cold in there in the winter (I live in Vermont) and our coffee cups/mugs were nasty cold in the morning. I figured someone must sell something to solve this problem & sure enough, I found the Jura cup warmer. Frankly, I thought I was crazy shelling out another $300 (ouch) just to warm my cup before brewing the morning coffee.
Finally gave in and bought the cup warmer-glad I did! It enables me to enjoy a hotter coffee product which stays hot longer and is especially nice when  serving guests. I have dinner parties and serve whatever guests want-espresso, cappuccino etc. Beverages are served hot even with the delay of putting them on a tray to serve or running into the dining room or deck.Certainly much easier and more convenient than other methods to pre-warm the cups.I have the Jura J9 and enjoy both items and I am sorry I didn't buy the warmer at the same time I bought the espresso machine a year ago.
When I first saw this, I thought it must be so over the top to have heated mugs. I have to say I really think it makes a difference to have a warmed mug. This keeps your drink nice and warm. It feels lovely to old the cup in your hand. This has a timer so you aren't heating your mugs all of the time. The warmer really only holds standard sized cups. So your very large mugs will not fit this.If you have already splurged for the Jura this makes a nice addition to your counter.
But after just one morning of nicely warmed cups, I was sold (as was everyone else in the house).Pros: toasty warm cups --- no more running hot water in a cup 1st, simple to set up, auto on/off timerSemi-Cons: my husband likes hefty mugs - we can just barely fit 4 of the mugs he prefers + 2 of my cups in the drawers. This isn't a big con, but more a warning for folks who like hefty mugs.To-be-Determined: not sure how this will work in the summer months.
I put a thermometer in with the cups to see how warm they got. After heating for an hour, the thermometer read 110 degrees Fahrenheit. I tried another thermometer and heated the cups later that day and again the next day for an hour each time. The thermometer warmed to 108 degrees Fahrenheit, just lukewarm to the touch. I returned the second machine.It is hard to believe a company cannot build a cup warmer to reach a specified temperature. But  this cup warmer is built using thin, translucent plastic sides.
Really completes the coffee expirience. The auto-on feature is great. Holds six good sized cups or mugs but not tall ones.
Answer: this warmer i keep on all day. it has a built in timer (on and off). about 20 min till warm cup. if you want a quicker way to warm up your cup just put some water in it and place  in the microwave for a min or two.