Works Like a Charm. I was looking for a sleeve to replace my worn and tattered Dunkin’ Donuts branded sleeve and stumbled upon Java Sok. Needless to say I was psyched to find a product that seemed to be what I was looking for. My first impression when they arrived was that they looked great (vibrant colors) and were well constructed. Well after using Java Sok on my home brewed ice coffee, I can honestly say that work and look fantastically. Very pleased. Do yourself a favor and pick up a pair, you wont be disappointed.