This isn't the first DIY cork bathmat we've seen, but it is the first that turns cork on its end. Cork is naturally waterproof, a great cushion for your feet, and sustainable from farm to bottle.
Danny Seo, from the craft blog Daily Danny came up with this great DIY bath mat from wine bottles, and a simple frame. Just arrange them vertically, so they're snug, and you're all set.
Another DIY Cork Bathmat from Crafty Nest:
See a complete DIY from Crafty Nest here.
(Images: First image by Danny Seo; Second Image by Crafty Nest)