I just got one of those fat-bottom cups with the rubber bottom to sit on the floor. They don't move around. Another option would be to get a pardner to ride with you to hold the cups.
1953 Chevrolet 3600 Fried Green T'mater (Vern) In the Stovebolt Gallery Caution: Political Statement Man who runs in front of car gets tired, man who runs behind car gets exhausted.
