Now you can take your coffee mug along for the ride with the Topeak Modula(TM) Java Bike Bottle Cage. Its height and diameter are adjustable so it can fit a variety of tumblers or you can even secure your speakers. FEATURES: Adjustable diameter and cage height Rubber and engineering grade polymer construction Fits large sized tumblers or speakers Adjustable length: fits 6.9" - 9.4" Upper outer diameter: fits 2.9" - 3.5" Lower outer diameter: fits 2.4" - 3.1" Dimensions: 7.6" - 8.3" x 3.7" x 3.5" Weight: 4.22 oz.