– Why is it bad to use my water bottle for multiple days without washing it?

Question

I either drink it all or I dump it and put fresh water in. What are the risks if I don’t wash it? It’s just me drinking out of it. I’m talking days and days like why ever wash it if it’s just me?

Edit: Clarified the amount of time without washing

In: 3181

Answer 1

I’ve found my water bottles at work can get a bit mildewy under the cap just from moisture in the threads over time.