Yeah the bars are 710mm, they are huge. They can be cut down if I find they are too big.
https://imgur.com/C8uA3TE
https://imgur.com/QDM8ue9
Not super worried, the Nalgene cap covers the threads, I've also seen people put a Ziploc bag with a rubber band over the top to keep contaminants out so I may do that. Or I may move the mount, haven't really set the bike up yet, just trying things.