NutriBullet Travel Insulator (Black) Protects your NutriBullet cup in an insulated travel bag. Keeps your shake or drink cool on the way to work or school. Convenient carabiner allows it to be clipped to a bike or backpack. Weighs less than 5 ounces. Made from machine-washable durable neoprene, the same material in wet suits. Designed only for 24oz NutriBullet tall cups for the NutriBullet 600, NutriBullet Sport, and NutriBullet Pro 900.