Carry your special beverage in style with this one of a kind St. Pat's flask!

It's magic basically, but if you want the scientific answer...

The process is called Dye Sublimation. Artwork is printed onto a sheet of high-release paper and transferred onto the substrate using heat and pressure. Heat converts the solid dye particles into a gas — known as sublimation — and bonds them to the surface. The dye is absorbed into the material creating a smooth, and machine washable finish.