My 2 yr old drank of another childs sippy cup right after the child drank from it. what are the chances of her catching bacterial meningitis? does it live long once outside the body? its rare,1 and 10 carriers, what if this kid is a carrier? worry?

A toddler touches objects/the floor/bugs/debris and puts their fingers in their mouth routinely. They have an estimated 100+ exposures/day to a variety of germs. In spite of this normal behavior it is rare for any of them to get meningitis. If you had him vaccinated properly the big risk germ is no longer an issue. Worry if you want. I consider it not than worth the effort.

Quite unlikely...much more likely to get a common cold or other viral illness, including COVID-19 from this exposure (although if that child seems well, that is also not very likely)...Meanwhile, keep up to date with your child's vaccinations!