me too..... there was nothing else that worked for me except mineral water.
I was buying San pellagrino by the case!!!

try and buy from the supermarket or bottle shops or delis coz the bottles are cheaper that way too.

When i was at work, i'd have to pay $4 for a 500ml bottle of san pelligrino and from the supermarket, it was $2.90 for a ltr bottle.

for me san pelligrino was the only one that worked, which is weird coz usually water tastes like water.

I think the specific mineral content of each different mineral spring makes a big difference.