Pour the contents of the juice box into the wine glass. Add zubrovka until the glass is pretty full (generally the ratio of zubrovka to apple juice should be around 1:1, but variations are fine). Drink, preferably with friends.
One will immediately notice upon his first sip of Polish apple pie that it doesn't really taste like he's drinking alcohol. It's almost like good apple pie: tastes like spice and apples. Be aware, it's easy to get very drunk off this stuff very quickly; zubrovka is potent.