Well, I don't use plastic reuseable water bottles only stainless steel, and I suggest that anyone who does use any reuseable water bottles should always wash and sanitize their bottles no matter what and change them up some of them are very expensive to just throw away so be sure you clean them on a regular basic this keeps the germs down and soaking the plastic bottles in soapy water helps using a bottle brush is super helpful

Sanitizing is the process of reducing the number of microorganisms on a surface to a safe level, while disinfecting is the process of killing or inactivating most or all microorganisms on a surface. Sterilizing is the process of killing or inactivating all microorganisms on a surface or object. Plastic is porous, absorbs whatever is put in it. Stainless is well, stainless. Warm / hot soapy water is sufficient for a healthy outcome in stainless I think.

In fact, a November 2015 study in Circulation found that coffee consumption was associated with an 8% to 15% reduction in the risk of death (with larger reductions among those with higher coffee consumption). Other studies have found that coffee drinkers may have a reduced risk of:
cardiovascular disease (including heart attack, heart failure, and stroke)
type 2 diabetes Alzheimer's disease and Parkinson's disease
colon, uterine and liver cancer cirrhosis gout.
“In wine there is wisdom, in beer there is Freedom, in water there is bacteria.”
― Benjamin Franklin
I drink only beer and coffee from my stainless, see above?

Thank you JimJenkins,
I use a stainless steel water bottle and wash it with warm soapy water!

Cliff3, I don't have a dishwasher. I consider it therapy to wash dishes and truly enjoy it. Me in the kitchen, especially when family is here on holidays if you know what I mean? Working 12 hour shifts at Akron General Hospital in January and I had hot coffee in a stainless travel mug from home near Canton, it was still warm after 12 hours!