The 30oz "Big Sipper" Mug is the ultimate road dog. This bad boy keeps your cold drinks brisk and your hot drinks piping for hours with its heavy duty double insulated vacuum chamber. And don't worry about feeling like you're lugging around a bowling ball, because the sleek design perfectly fits in your hand like it was made just for you. So next time you hit up a beach bash or poolside fiesta, make sure to bring your favorite amigo. Bob's 30oz Big Sipper (includes straw for you sipping enjoyment).