Fresh water at all times, no problem

I have this water fountain cooling for two years, permanently connected, summer and winter. It does exactly what is asked: distribute water, refrigerated or not. As a precaution, I use spring water from Auvergne, not limestone. The machine's never failed, and the taps are always fully effective. Cold side, the water temperature is lowered by ten degrees C, whatever the season. The physical principle of the device is the "Peltier effect". Moving parts are reduced to a fan that turns on rarely medium heat, and obviously a little more often in hot weather. This fan is very quiet. Most large 5 liter bottles fit perfectly, but some recently appeared, have a neck too small, wrong. Just choose, or possibly transferring. The one-liter bottles and a half have always adapted without difficulty. So all is well!