We had a new water cooler system installed in the office a while ago. I wanted one of the recognised brand water coolers (Ballygowan, Tipperary etc) but what I ended up with was a cooler, which looks like any other cooler except it has no bottle on top. Ordinary tap water (quite disgusting taste) is fed into the back of the cooler where it is filtered and cooled.
I was most surprised with the result. It is cold and it tastes great, or rather it doesn't taste at all. I wouldn't know the difference between it and the branded water. There are no bottles to change or anything else to do. I understand that in some offices people fill their water bottles up several times a day and the main bottle is always running out and needs to be constantly changed.
The company that installed them has a maintenance contract and calls out every so often to change the filter.
Murt