If you've amassed a massive collection of wine corks, here's a fun upcycling idea: Turn them into a functional bath mat. Pick up a large shadowbox frame from the craft store, which is about the size of a bath mat. Then remove the clear front cover; fill it with corks standing upright until the entire box is full, not completely jammed. That's it! Cork is naturally absorbent, soft to the touch and anti-microbial.