Topeak modula java cage slimearly morning commute ahead transport your coffee with topeaks modula java cage slim alternatively bring along a speaker and play some tunes as you spin your legs this modula java cage slim is fully adjustable to accommodate slim travel mugs and speakers featuresmaterial engineering grade plasticrubberrubber strap secures cage contentsadjusts the cage to secure bottles with different diametersfully adjustable to accommodate various sizes of travel mugs and cyl