1) Deliverer 2) Delivery boy 3) Deliveryman 4) He keeps things bottled up 5) He may use a float 6) Someone who delivers milk 
A milkman is a person who delivers milk in milk bottles or cartons. ==Milk deliveries== Truck drivers who transport milk from a farm to a milk processing plant are also known as milkmen. Raw milk is picked up daily, or every other day. Milk deliveries frequently occur in the morning and it is not uncommon for milkmen to deliver products other than...
• (n.) A man who sells milk or delivers is to customers.
Milk'man noun ; plural Milkmen A man who sells milk or delivers it to customers. 
Type: Term Pronunciation: milk′man Definitions: 1. Louis A., U.S. roentgenologist, 1895-1951. See: Milkman syndrome
[n] - someone who delivers milk
noun someone who delivers milk