Cal. Code Regs. tit. 3 § 621
Milk cans for use in connection with bulk milk dispensers must be (1) constructed so that the tube is contained in a pocket or cup which protects the tube against contamination or (2) the side of the can nearest to the outlet on the bottom must be supplied with a metal channel or shield for insertion of tube for protection. Other type of containers for bulk milk dispensers must be approved by the director. Cans with the tube coiled on the bottom of the can are not of an approved type. All cans must be sealed in the milk plant where filled and the tube when placed on the can, must be protected by covering, such as pliofilm, plastic, or other suitable material, to protect the tube in transit from the milk plant to the place of serving. When the milk can is empty and removed from the dispensing cabinet, the seal must be broken, and the container rinsed and drained.
Cal. Code Regs. Tit. 3, § 621