Looks like you picked up a really good deal for those bottles. The Mineral Water bottle should be worth more than what you gave for the lot. As far as the ink, I have a few myself but not really sure about the one you have. Kinda looks like a Carter or Staford ink bottle maybe from the 20s or 30s era. Hope you the best with the bottles you have.. Oh, and my name is Ralph also...
Yeah, the ink is a rather common bottle, apparently machine made. That and the faded ACL (applied color label) Pepsi have little value (8 ounces is small though for a Pepsi though, I thought they were usually 12 or 16 ounces) but the large mineral water you got is very nice and clean. Dunno about rarity but it is an attractive bottle, and usually the larger size bottles are less common than their smaller counterparts. It looks hand-blown to me and is probably a 1900-1910 piece.