A thirst invoking journey, as there is now less milk than before

I once saw a documentary about this, charting the journey of a milk container (or "carton") as it scoured the streets of a bleak and dismal city in search for it's long-lost partner. I found it very informative on the subject of errant milk, and would heartily recommend it. The accompanying soundtrack ("Coffee and TV" by the popular beat-combo Blur) was also rather bon.

i know exactly what you are refering to. i think i saw it on one of those documentary channels on my new fangled digital thingybob.

MTV or maybe The Amp i believe.

I saw one of these on the way home last night, just south of Covent Garden.
Could it be the same one I wonder?