The flip flop doormat from Havaianas is a combination of your favorite footwear and your front door mat. You just slip in and out of the flip flops as you enter and leave the house, aligning them into their proper holes in the mat.
Of course there are a few potential issues with this that may outweigh the convenience of having your flip flops handy at all times- anyone else entering you house will be wiping their feet on the tops of your flip flops. Also when the sandals are in the mat, the straps might be a potential tripping hazard. But overall, it’s a pretty good idea that would work for some people.