How dangerous can milk get when outside a fridge?

Question

I have a blender bottle I make protien shakes in. After a workout, I rinsed my blender bottle out, but was unable to wash it. I forgot about it and didn't open it until 3 days later. There was an awful stench exiting the bottle. I washed it, but there was still somewhat of a smell in the bottle. Should I wash it again, or just throw it out? Thanks for the help!

Answer 1

A cap full  or two of bleach  with water or vinegar and soda should do it.

Answer 2

put some baking soda or vinegar in the bottle to help remove the odor

Answer 3

It won't hurt you if you let it stink, but I doubt you want the stink, so wash it out with something safe but strong, like vinegar.

Answer 4

Wash it out good with soap and water, and let it air out. It'll be fine.

Answer 5

you want a smell out of anything (including yourself) put some tomato juice in it and let it sit in there a couple days if you don't feel like having your bottle smell like vinegar instead of old milk. if you have a hangover and smell like it, drink some/a lot of  tomato juice and in about an hour or so you won't be emanating anymore.