How long can you leave a bottle of alpro growing up milk out for?

My boy has the alpro oat growing up milk he don’t like warm milk he prefers it cold so if he’s left any I usually pop it in the fridge and discard it later that evening if he doesn’t finish it. I’m sure the same goes for the soya milk as they both say once opened u refrigerate it so putting the bottle in the fridge after should be okay but not sure if u warmed it up you can tho x

So if it isn’t open it can stay out of the fridge