Saying it's a girl thing to prefer bottled water is frankly sexist and just rude. Bottled water does taste different from tap water depending on where you're at, and people have preferences. At school, I'm fine with the tap water--it tastes good. But at home, we have well water and I don't like the taste so we get bottled water (the bottles get recycled, of course).
If you really don't like the taste of tap but you're worried about how to get bottled water, maybe you could buy a filter that goes on the sink faucet? I'm thinking about buying one if I get accepted for this fall. Sigg bottles are environmentally friendly and the new ~it~ thing for people trying to keep up with trends..lol.
PS: Gardengrocer is awesome!