How to disguisen a half liter water bottle?

With summer upon us and the necessity for players (and everyone else) to stay hydrated What suggestions for disguising the ever popular .5 liter plastic water bottles do the people at Knight Realms use or have seen

Let's face it, they definitely interfere with game immersion ?

Could always make a wrap for it. I'm a big fan of vinyl faux leather upholstery fabric for similar purposes.

Safety > immersion, but a pouch or drawstring something could work, too.

Some people carry canteens, water pouches, or Glass looking ( very stiff plastic ) bottles.

You could always get something like this and put water in it:

www.amazon.com/Maxam%C2%AE-Jumbo-Stainle...-Flask/dp/B007PAO4LO

I created a "slip cover" using soft suede for a bottle by cutting out a circle larger than the base of the bottle and then sewing on a tube to create the sides. It has drawstrings so I can tie it to my belt if I want to, and it slips on and off a bottle fairly easily (in hindsight I should have made it a bit larger). It was easy to do and does help me stay hydrated.