Greenbrier Double Wall Travel Mugs with Colorful Wraps & Lids, 16 oz, Black/Red/Blue/Green, Set of 4 Double-wall design helps keep drinks warm or cold Textured non-slip sleeve helps you keep a grip on hot beverages without the burn Screw-on lid with a flip open cap helps prevent leaks and spills Quantity of 4 16-oz travel mugs, 1 in each color