Finally, a new purpose for all your old wine crates! Your cat will never be so thrilled by your enthusiasm for vino as the moment you turn these old boxes into a cozy little space just for them.
The first thing you can create by uncycling these crates is this drawer-bed.
Collect several old crates and remove all bottle-separators and nails left inside. File down the edges and sand the inner and outer surfaces to remove any splinters that could pose a danger. If you only have one crate to work with, make a little drawer, topped off with a soft and cozy cushion.
If you have more material to work with, you can go one step further and make a small roof with cardboard to make it feel more like a secret hiding place for your mysterious feline. (Tip for protecting your floors: glue squares of felt on the edges to avoid scratching up any surfaces.)