There's a Kickstarter campaign for a bottle that comes with two-sides for hygienic purposes.
It's called the Buddy bottle, and one side is for your use, while the other is for whoever's dirty little lips you don't want to come in contact with.
They're calling it a "multi-user" bottle and looks like it's geared more toward parents who don't want their kid's backwash all over their water.
There are two prototypes for the bottle. One has the two "chambers" side-by-side with tow spouts, while the second almost looks like two bottles on top of each other.
Their Kickstarter goal is to raise $25,000 by September 12, and as of this writing has $680 under its belt.
If you have a sharing problem on your hands, this bottle might be your savior. Or you can just have a separate bottle for your kids.
