Ordered the new model of Fidlock twist 590 to mount to the down tube of my MTB. Hoping this would be the solution of staying hydrated during shorter rides where a hydration pack is unnecessary. In theory it is a great idea. But in real world applications it fails. Although the new design with cap keeps dirt off of the spout, the bottle becomes very dirty and disgusting while riding. I imagine the bottle will not last long, only time will tell. The bottle capacity is only enough for a 30 minute ride at most. And as the previous version it is difficult to squeeze and get a good flow once it gets to half full. Overall looks cool and fits perfect but the functionality of the product is underwhelming. I will be searching for alternatives and suggest you do the same. Not worth the $50.00.