I've been looking for a drink holder for Patty for a long time. Because of the way the trike is built, I cannot add armrests and I refused to drill through the body to bolt on a carrier.
A couple of days ago,I ran across this on a web site, so I ordered one. It came today and it is fantastic. Installs in minutes with no drilling . And only $22 bucks!
Link is below the picture.
Harley Davidson Passenger Cup Holder