The Ello Oasis Stainless Steel Tumbler is designed for everyday use: leakproof, cupholder-friendly, and perfect for cold drinks on the go. Available in 14oz, 18oz, 24oz, 30oz, and 40oz sizes, there’s one to fit any lifestyle. Its retractable straw lid keeps germs out and makes it easy to toss in your bag without worrying about spills. But to keep your tumbler performing at its best, regular cleaning is key.