The topeak modula ex bottle cage on the bike hydration is a must to get the most out of your performance the problem how to securely carry your sports bottle along with you so you get that vital boost you need here topeak provide an excellent solution with their modula ex bottle cage this topeak modula ex bottle cage is highly versatile and will hold most small and large bottles thanks to its adjustable fit to different bottle diameters plus the new shape design holds bottles more securel