This is a 2 liter bracket that does not pierce the bottle.
If you have a bird feeder for your two liter bottle, this will allow you to hang the bottle.
The advantage of this bracket, is it retains the integrity of the bottle, so it's also good for hummingbird (liquid) feeders - https://www.thingiverse.com/search?q=bottle+hummingbird&dwh=445d59852518da4

If you are using bird seed, this piercing hanger is faster and easier - https://www.thingiverse.com/thing:3810414

Also, the bird feeder I used, is this one - https://www.thingiverse.com/thing:1710755