Why is there no room for Irish bottled water?

WHAT is going on? I was having a business meeting in the Great Southern Hotel at Cork Airport at the beginning of July and we ordered some drinks.

I ordered a sparkling mineral water expecting to get Irish water. What the waiter brought was Coca Cola River Rock. I then requested a Ballygowan or other Irish water only to be told that River Rock was the only water they now stocked.

I thought this was just a one-off incident but later in the week we were staying at Bewleys Hotel at Newlands Cross in Dublin and the same thing happened. No Irish water to be had!