As I understand it (and I may be showing my age here) Non-Combat Prop lammies are for items which look like they could be used as a weapon but aren't built to the LT safety standards (a real wooden staff being the most common occurrence I've seen). If you latex bottle of wine was "weapon safe" you wouldn't need a lammie, if it wasn't you would.
Dantes of Melnibone
Master of the Corruptors Guild
Magister of the Storymancers Guild