The Mad Hatter e-juice range is best known for its famous I Love Donuts™ e-juice. All Mad Hatter e-juices are manufactured in an FDA-registered, medical-grade cGMP-certified facility. They contain US-sourced propylene glycol and Malaysian vegetable glycerine. All this amounts to a consistent and reliable juices, made in-house to very high standards. When you vape Mad Hatter, you know you're in safe hands.