I'm looking for something i can attach to my bike to carry my baritone in. Any

[Dreezzzzyyy]

suggestions? Im currently in college and a part of the school's marching band. Due to this often times i have to walk around with my large baritone case instead of being able to ride my bike. I was in search of something which could assist me in carrying around the baritone but at the same time something that i could attach to my bike. Any suggestions on what i could get to solve my problem?