Large water bottle

Nalgene has always been my preferred as I like to take never-ending sips and I don't care for the taste that tin ones create, but I've heard good things about this guy (plus it has the water drinking lines to keep you on track to a more hydrated day).

I'm a huge fan of Hydroflasks. It might not be as big as you're looking for, but these are my favorite water bottles!

I bought a big gallons one off amazon and I love it!! It has helped me up my water intake drastically!

The Vmini Water Bottle with Time.

All the above look awesome. My preference is S'well - their bottles comes in different sizes (I have the regular one which might be too small for you). It keeps cold water really cool for hours, so much so that I don't actually need ice in there. It's pretty lightweight for what it is. You can have hot beverages in there too.

Can't beat the "Klean Kanteens" they stay warm and cold all day, actually they stay cold for days if left. Also, the lid has a loop that makes it easy to carry and or tie to the side of a pack. Its BPA free, seal proof with lifetime guarantee and love the color shown here: Can't say enough about the Klean Kanteen.