Hey guys,
So I was performing the other night, and someone asked me if I could buy a sealed glass bottle from the bar, and make their card go inside.
Unfortunately (and probably unsurprisingly) I couldn't. ( however I did pull off a very highly received improvised card to `test tube` ( long plastic tube containing a shot ) trick

However it kept bugging me and I wanted to find a way, and two days later, I have a sure-fire method to do it.
But before I make any exclamations to owning the trick, is this something that has been done before? I've never seen it.
I kind of hoping not as I think if I begin to pull this off, it would be a real reputation-maker, especially with being able to perform it on a real bar in a street/pub magic public performance.