Hydration equipment / packs for epic rides

Equipment
36

https://www.thule.com/en-us/bike-packs-bags-and-racks/hydration-backpacks-and-bags/thule-vital-6l-_-3203639

This one is very nice. They have a smaller one also.

Since Im a big boy, I plan on running bottles till first aid station at unbound and then adding the hydration pack on top of bottles.