Mo. Rev. Stat. § 196.825: Return of shipping containers.

Every person receiving milk, cream or ice cream from a common carrier in cans, bottles or other vessels which are to be returned to the shipper shall cause such vessels to be promptly emptied, cleansed and delivered to the common carrier to be returned to the shipper, and it shall be the duty of such common carrier receiving the same to have said cans, bottles or other vessels in transit within not to exceed twenty-four hours after receiving the same.