Upside Down Tomato Hanger.

Self explanatory.

There are many of these types of tutorials, but none that I could find that instructed you to keep the bottom of the bottle on and not cut it off completely.

Keeping the bottom on allows you to turn the bottle over without spilling your soil.

Empty two liter bottle

Tomato plant

Soil

Twine

Knife and/or scissors

Using a knife, cut the bottom of the empty bottle, leaving about an inch uncut so that the bottom remains attached.

Cut off a couple of stems so the tomato plant will grow new roots and poke the tomato plant deep into the neck of the bottle.

Turn bottle over.

Poke two holes in the bottle with your knife and pull the twine through.