I always see these crafty ideas that are all, "Use your old formula cans!" and I am eagerly awaiting the day someone comes up with something for those oblong plastic Similac tubs.
Turn bottles into drinking glasses: soak heavy yarn in acetone, then wrap around bottle where you want to cut it 5-6 times. Light it on fire until you hear a crack, then run under cool (not cold!) water until it breaks off--make sure to continually turn it under the water, and you may need to gently tap it on the sink edge to get it to break. Then sand it down with fine-grit sandpaper until smooth enough to drink out of. Would be fun for a special bottle of wine/liquor from an event, or to...
wine bottle glasses