I do use any half drank water bottles on my plants and for in my dogs

bowl, he doesn't care who drank before him. I never throw them down

the drain. I always hear how someone doesn't claim it's theirs and you

never know who drank from what bottle routine. We all live in the same

house and have the same germs but my girls would sooner die then take

the chance on drinking after each other. I have also adopted the "write

your name on your bottle" practice. I have a sharpie on velcro to the

front of the fridge. It has cut down on half used bottles in our house.