If PIGS can fly...
...then Pilsner can be served in a jar.
There are just two options - they wanted to spare on buying proper beer glass (an be hip on top), or they really hate that beer.
My bet is on the first one, The CRISP from Sixpoint Brewery is more than decent, German style pilsner. Solid bitterness and fresh finish. Solid carbonation and delicate malt. Clearly, no deviations toward American-style aromatic hops. Clean, pure and drinkable.
Brilliant, if you get some ribs on top.