There is a project called Bottle School which is performed by Hug It Forward organization in Guatemala. The school’s walls are built out of plastic bottles stuffed with plastic bags and other trash for isolation collected and made by students or volunteers. They bound the bottles between chicken wires connected to metal frames, and cement mixed with sand is applied to outside of the bottles to built the walls. They accept donations and partner with community and municipality to have access to labor resources.
For more information about this project you can check their website.
Bottle School