Not Exactly Buried Treasure

I thought the inscription on the bottle lid was rather unusual. Made from aluminium I uncovered it whilst edging one of the vegetable beds on N1 Plot this afternoon. The grass areas where a was working have been uncultivated for over 50 years except for the grass being mowed. The inscription on the lid reads:

"KIA-ORA Ltd Suppliers of Fruit Beverages By Appointment to the late King George VI

Well There's Always Tomorrow??