My bluetooth speaker fits in my cup holder!
It's a great speaker too (amazing bass - it's called the JBL Charge). I hooked it up to my iphone using a cable but I could have just as easily done it wirelessly (works very well that way in fact)...I just wanted to see how well it worked using the cable. Anyway it was SO nice to ride today on a paved long cycling trail through a nature reserve/wetlands right across from downtown and along the river...while watching the river glisten in the late-afternoon sun and watching the rowers row and cherry blossoms cherry and geese goosing each other in the grass while I listened to Goldfrapp 7th Tree. :) Highly recommend this method if you like to hear music as you go.Attachment 369731