Instead of just throwing away that empty milk jug, for it to sit in a landfill for generations why don't you make an easy, cheap bird feeder.
- Empty milk jugs
- a marker
- A pine cone
- Sunflower seeds ( any bird seeds would do)
- Peanut butter ( the thicker the better)
- and Raisins ( or some kind of fruit so the birds have a variety)
I would make the suggestion that you do this outdoors a) because it can get a little messy and b) it's always great to build things in nature with great scenery.