My husband live in another city my doctor want his seman how do I keep it warm I live in ct. And I have to bring it back how do I keep it warm

No go. Semen samples must be processed fresh, so ideally they are obtained by masturbation in the lab where it will be processed. Important aspect of semen analysis is % of motile sperm present. Sperm exposed to air die very quickly & thus are no longer motile. Should have been explained to you.