A layered cocktail can look like rocket science, but it can be made easily with this tool. The Rainbow Cocktail Layering Tool separates solutions of different densities. The resulting effect is a beautifully color-blocked drink that's visually intriguing.
The video attached shows you how to use the tool effectively. You'll need the proper ingredients and steady control when pouring the liquid, but aside from that, the funnel-like tool does the rest.
Aside from colorful summer cocktails, you can also make hot layered drinks. The tool aims to create cocktails "that look as good as they taste." If you're into mixology, you'd find the tool fun as it lets you be your own bartender. The kit comes with an instructional booklet as well.