The 'bag' empties without letting in air (so can be placed any side up).
Can pull out the bag and get rid of the box.
>>In fact, when you've finished with them you can make great footballs out of them by blowing them up
We used to play 'goon roulette' (a drunk variation of Russian R)
Drink the goon (4-5L as the bags are square)
Fill it up with water.
Four people lie down, one per side, heads within 30cm of the edge of the bag.
Then burst the bag by jumping on it.
The bag bursts down one seam and someone gets very wet.
(Drunken) laughter ensues.
Trick is the sides next to the spout have a different strength and are njsd likely to burst....
EDIT: 'goon' is slang from flagon/flagoon and refers to a large container for wine (or woobla = cheap wine, because thats te sound you make after you've drunk it)