The new Amazon Dash button, a small Wi-Fi connected device that re-orders you a specified items by pressing a button, is an interesting product. Pretty design, but limited use makes it something very niche for people who really re-orders many, many times the same products. Not sure I would want a ton of Dash around the house. I think the same concept in the form of an app would be much more practical. Imagine a grid of 3x3 with 9 of your most ordered products.
Keep it away from your kids or else… ;)