Love using this instead of carrying 4, 5, or 6 gel packs. Gel pack tops can be more difficult to open and messy. This one bottle will easily hold 6 (even seven) 1.1 oz gel packs. Top is a bit stiff to open, but repeated use does help to make it easier to open.
I can't ride and open gels so I have to stop to do that. Then I have to catch up as my buddies are hard core and will not wait on me.
So the flask works. I don't need to stop.
And I have no litter to deal with.
That's about it. A solution to my problem.