I'll try and answer some of the questions asked.I currently do these cups in three sizes and will be doing another sometime this summer(I'm copying Washington's Camp Cups).The smaller ones I do are often called Gill cups or rum cups when describing them unfortunately they often do not measure a full gill so what they were or called in the period I don't know.I make them 2" tall and 2 1/4" as are the ones in the current photo.I also make a 2 1/2" cup with a rolled over edge which I'll post below which is a smaller copy of Nathanial Greene' camp cup.
In keeping with 18th century tradition these cups are hard soldered/brazed .The lapjoint is then planished .filed and then polished and other than a slight discoloration of the joint it is basically invisible and does not show in photographs.The joint does show some on the inside as in the 18th century the same care was not given on the inside.As the second cup was field tested at Lake Cumberland you can see some tarnish lines in the joint in the photo below.
Glad to answer any other questions
Mitch
Nathanial Greene's Camp Cup
