Aquifer Blue Rambler 20oz Tumbler with MagSlider LidIn 2006, YETI was founded with a simple mission: build the cooler youd use every day if it existed. We love these products for every outdoor adventure, from the beach, to the mountains, and everything in between. Any tumbler that's coming along for the ride needs to be tough enough to keep up. The Rambler 20 oz. is made from durable stainless steel with double wall vacuum insulation to protect your hot or cold beverage. The magnet on the included