.97 cents for 18 bottles of h2o

I was pretty surprise for this one. I went in to Vons to get some water, I saw the Arrowhead 6pk 700ml bottles for $1.99. I have a $1 coupon for it, so it’ll make it .99cents for each pack of 6 bottles. I paid $2.97+crv and when I got my receipt, there is a $2 catalina from Arrowhead. And that makes my bottles .97 cents for 3 6pk of 700ml bottles of water or .05cents for each bottle. So, I went back in and got more bottles and visited another store for more.