The Yeti Rambler Tumbler Straw Lid is a perfect companion to any Yeti Rambler tumbler. With it's oversized straw, it has no problems handling thick smoothies or fresh water. Whether your drinking a frozen daiquiri, smoothie or just about anything else, the Rambler straw lid can handle it. And with all of Yeti's products, the Rambler Tumbler straw lid is made from BPA free super durable, shatter resistant and dishwasher safe plastic.