The Personal Java Press separate mug and carafe eliminates over-brewed, muddy coffee produced by most personal French Presses. Silicone ring plunger design virtually eliminates coffee ‘blow-by’ for the most flavorful, mud-free coffee. Nesting, insulated mug includes Sip-It Lid and is made of lightweight, shatter-resistant, BPA-Free Infinity clear polypropylene. Camo insulating EVA sleeves on mug and carafe remove easily for cleaning.