heres what i know but this should prob be in the halacha thread
many rabbanim hold that a kuerig must be toiveled.
dunking a keurig in water WILL break it, this has been tested and proven by many.
many rabbanim hold that a keurig does NOT need to be Toiveled such as R' Moshe Heiniman of baltimore and starK.
R' Moshe Feinstein held that all electronic appliances which need to be plugged into the wall do NOT need to be toiveled as they have the din of "mechubar Le'karka"
That being said, most of the yeshivish black hat circles choose not to rely on this heter from R' Moshe
Yet, R' Eliyashuv told people that when one has electronic devices which would break if toiveled then one can and should rely on R' moshe's Heter in such cases, (obviously only plugged devices).
For those who do not wish to rely on the aforementioned psakim there are two additional work arounds;
1) giving the device to a non jew, it should be made clear that it is a permanent present which you would like to borrow
2)take the electronic device apart (somewhat) and put back together. This is usually NOT a good idea as the chances of breaking it are about equal to dunking it in the mik (high)