Indiana Code Title 7.1. Alcohol and Tobacco § 7.1-3-31-12

Sec. 12. (a) A designated permittee or vendor within the refreshment area may allow a person to exit the designated permittee's or vendor's licensed premises with not more than two (2) open containers of an alcoholic beverage at a time.  The contents of an open container may not exceed the following:

(b) A municipality may not require a designated permittee or vendor to purchase containers for alcoholic beverages from a certain vendor.