Liquor Bottles.

Collecting all 3 liquor bottles will earn you a free liquor bottle for your loft.
Cross the bridge by the Degrassi Dot and head to the alley.

The bottle is with the trash cans.

Head to the train station. For this bottle you will need the help of some friends. Tower up to the window. The bottle is inside.

Hop out of the window and head to the back of the train station. Jump down to the lower level.

To the right and around a wall. The bottle is with the trash in a small alcove.