# 28.143 Containers.(a) *Beer.* Beer being exported, used as supplies on vessels and aircraft, or transferred to and deposited in a foreign-trade zone, without payment of tax, may be removed in bottles, kegs, or bulk containers.(b) *Beer concentrate.* Concentrate may not be removed for export, or for transfer to and deposit in a foreign-trade zone, in containers of the kind ordinarily used by brewers for the removal of beer for consumption or sale.