Very old antique aqua pale blue with opal tinges glass bottle.  7 inches tall and 3 inches in diameter cross the base.  There are swirl marks in the glass which you can see in some of the photos.  It is very difficult to read the marks on the bottom but after many different photos and angles I think I am seeing something like "8 oz." or "H oz." over  a bar and under the bar a "W".  The bottle holds about 15 ounces of water to the base of the neck.  Found in a roadside junk shop in Pennsylvania over 40 years ago.