Camelback also has a UV top, we’ve used those a lot when traveling overseas
Lots of people drink water to stay full between meals. I don’t think that’s a bad trend. Also, soda drinking has decreased recently as people have realized how unhealthy it is.
^Well, I don’t think people were carrying soda to classes either a generation ago. That it’s for weight control is interesting.
And no wonder my students walk in and out of class all the time–they must have to pee constantly! 
I rarely drink water and would never buy it. If our son has a water bottle, the army issued it to him and probably told him how to keep it clean. I don’t understand this water thing at all.
@TooOld4School - if you google gizmodo and camelbak uv you’ll get an article I can’t link here because of language in the link text. I wouldn’t count on that filter after reading that…though if the water abroad is clear it may work?
I’ve been looking at filters myself, for an upcoming trip.
@OHMomof2 , All UV filters have that problem. Sometimes you have to run water through a pre-filter to remove particulates. The UV filters are really only good for water that the local population drinks. In places where you cannot trust bottled water (e.g. India) you should use it everywhere.
A lot of people use Steripens (we bought a Steripen ultimate), which dip into the water and can be used for tea, etc. Those are more versatile.
I’d also recommend getting something like a Survivor filter, which you can use to drink from streams, and will filter out bacteria and viruses for emergencies. It’s useful to have as part of your go bag too.
We ended up only using the Camelback UV on several recent Asia drips because it doubled as a water bottle with a new cap, and we bought large water bottles and refilled them.
Thank you @TooOld4School ! I’m considering the sawyer filter for a trip to the south pacific (where bottled water is safe but expensive and heavy to carry, etc). I’m guessing the tap water comes out clear so the UV top water bottle might be an option as well.