This is a great size for folks who want their water bottles to actually fit into a cup holder. If you need more water than half a liter, just refill it downriver from a local tannery. Or a water fountain, whatever. The straw mechanism on top of the bottle looks complicated, but it's very easy to break down and put in the dishwasher. Not sure I'd put mountain dew in it though. That's how you get ants.
The .5L water bottle is the perfect size for my daughters' backpacks. They use them for school, for sports, for around the house. Not too big for the cupholders in my car, either.
I LOVE CAMELBAK WATER BOTTLES! I have several and they are great!!! For the larger ones, you can buy an insulator which is great and keeps your drinks colder longer. You can also purchase tops in case the one that is provided gets gross. These water bottles are perfect for working out, just keeping with you during the day, etc.
This is a no drip, easy sip bottle. I think the no drip part is what I love. It is easy to carry to with you in a bag or backpack without worrying about spilling. People who want to take their water most places will enjoy this bottle. It does its job.
This is a family favorite. Everyone has their own color and we use them all the time. My niece and I keep a second one at school to use during the day while we teach.
This is a water bottle. It holds water. You drink the water. It does it's thing, but best of all, when it's dangling on the side of your pack you can show of the moosejaw to other hikers.