On this project, the materials used are recycled materials like small milk cartons and old plastic food containers. See video and written instructions here==>
This Instructable will show you how to make concrete boxes using cardboard and duct tape. This example is a planter, but they could also be useful as storage.
ATTN: fellow green thumbs and plant lovers! Just look at these succulents in happy lil' concrete planters. You can make those planters DIY style.