https://www.amazon.com/dp/B00UQ7P6HE/ref=cm_sw_r_apan_glt_fabc_8XCQE9XSFGCAQE3ZK0YP?_encoding=UTF8&psc=1

And you can unscrew this and use any bike bottle holder, I swapped the plastic with a metal one and it works great. I would recommend a stopper for coffee though