Cool Gear Reusable 15oz Coffee or Tea Travel Cup Insulated Leak Proof Rubber Grip.Java Exotic is an authorized dealer for all Cool Gear products.These cups have a "twist lock" mechanism on the lid to lock them tight, so no spill!15oz MugNo bisphenol A (BPA)LeakproofMicrowave safe (with lid off)Double wall constructionSpillproof designReusableTwist off lidEZ-Grip band