More to explore:
remove stench from sippy cups with white vinegar... I'm assuming if it works on sippy cups it will work on water bottles.
how to remove stench from sippy cups. I bet this wOuld work with coffee mugs as well.
cleaning sippy cups: fill both the cup and lid to the tops with white vinegar and let sit overnight
cleaning dirty sippy cups - let cup & cover sit overnight in white vinegar!!
Definitely need this. This would work with water bottles too. They all still smell like apple juice even after washing int he dishwasher.