Section 114121 Of Chapter 5. Cleaning And Sanitizing Of Equipment And Utensils From California Health And Safety Code >> Division 104. >> Part 7. >> Chapter 5.

. (a) Except as specified in subdivisions (b) and (c), returned empty containers intended for refilling with food or beverage shall be cleaned and refilled in an approved facility.
  (b) Consumer-owned containers returned to the food facility for refilling may be refilled and returned to the same consumer if the container is refilled by an employee of the food facility or the owner of the container if the dispensing system includes a contamination free transfer process that cannot be bypassed by the container owner.
  (c) Consumer-owned containers that are not food specific may be filled at a water vending machine or system.