Can you get mono from sharing a bottle?

It's possible.: Infectious mononucleosis (aka "mono") is indeed contagious as suggested by the name. Commonly referred to as "kissing disease", this viral infection is typically passed along by oral secretions (i.e. Saliva); so, certainly sharing a bottle would be a possible vehicle for transfer of saliva--much like kissing! please exercise caution with thorough cleansing of eating utensils used by those infected.