Yes,travel mugs.My much older dad started calling them "goer cups/mugs about 8-9 years ago,just sticks in me now.He still lives in western MD,maybe it is an eastern thing?
Inever heard it either,nor my neighbors/hunting buddies,and they also grew up back in western md and penn.But at about the same time dad also got on this sammie kick,not a sandwich,but a sammie?I just figured one of 2 things,a little senile or just does not care anymore,going to speak his mind!