By the third day of use the bottom has completely oxidized by heating the bottle in boiling water full of rust.
In addition, the dual power supply system is manual: despite the presence of two jacks on the device (220 and cigarette lighter) must be also set in hand a button on house or car or Off if you do the does not use, very impractical button to actuate before and after each use. Moreover, even if the use House is fast, the car makes use of half an hour to heat, stopped because the boiling water and steam prohibit using wheelchair: a one hour stuck on a motorway service area to heat and give a bottle.
Finally, the water volume measurement system based on the volume of the bottle or jar is imbitable: record indicates how much water it takes to 210 and 330 ml depending on whether your bottle has a wide neck or not, just get on to calculate the other matches and to find out which category your bottle returns. We followed to the letter these calculations and found ourselves with a cold bottle of doubling the volume of water indicated in the instructions allows properly warm the bottle, but always checking the result because we've had with the same settings burning bottles inexplicably.
We will change the bottle warmer.