Isopod, Rolly Polly, Doodle Bug, or Pill Bug. Whatever you call them, Rubber Ducky is the one!... for you or as a gift for that amazing someone who appreciates these adorable little guys as much as we do! Another Amphisbaena original, this tumbler features Gwen's illustration of one the most popular isopods out there. These 20 ounce, insulated, stainless steel tumblers are an excellent way to keep your drinks hot or cold, and in style too! They hold heat and cold well (we actually recommend letting hot drinks cool to be drinkable before putting them in the cup, that's how well it insulates!), are extremely sturdy, and are dishwasher safe, straw, lid, and all! It is recommended to place the lid in the highest shelf of the dishwasher. Each cup comes with a plastic sip lid and a stainless steel straw.