These wrap around pocket Handlers™ have a 6x3.75 pocket that velcro shut and will wrap around bottles and tumblers with a diameter of 3.5 inches to 5 inches.  All tumblers pictured are in the 30 - 40 ounce range. They also have a small loop to attach keys. 

These are scheduled to be here the first week of September and will ship to you as soon as it arrives.