I travel for work, and I never use the glasses in the room. I carry an insulated cup. There are some things you can't avoid, like bringing your own linens, just not enough room in the suitcase. I do wear sweats to bed and wear socks. There is only so much you can do before someone asks if your other jacket is a straight jacket.
2007 Chevrolet 2500HD D/A Classic CC Log Bed 4X4
2008 Jayco 299RLS
W6DCS, ex KC6LKS