You will have to forgive my lack of glass making knowledge. Yes, i think it's hand applied or hot worked, just like those found on hand-blown jugs. It's solid glass but it's not pressed like those found on pressed glass jugs.
Yes, i too thought the rim looked a bit like it was originally a bottle. The quality of it seems good, very clear thick heavy glass. Two mold lines on each side of the rim though, however, the body has no visible mold lines.