>> cheers. >> reporter: do your friends make fun of you for spending $6 on a bottle of water? >> i think it's a vital part of like my lifestyle. so i mean, i care. >> reporter: do you drink tap water at all? >> no. >> reporter: and while some may say only in l.a., stephanie and reese are sticking with their bottles. >> because you see, it's clear. now it's milk. >> reporter: do you want this to be a movement? >> yes, it should be a movement and it is a movement i think, because i see the direction of the people. let's push a little bit more. it's so healthy for everybody. you should drink more and more water. cheers. >> reporter: aditi roy, abc news, los angeles. >> do these people know we live in a country where you can turn on the faucet and get water for free and it's not going to give you a water-borne illness or kill your children? >> they live in california. we have a drought. there's a water shortage. >> talk about first-world problems. you know the saying about a fool and his money, right? >> no, what? >> they will soon part. the people selling this $20 bottle of water have proven