Ello Cooper 40oz Stainless Steel Water Bottle — White Marble, Vacuum-Insulated with Locking Straw Lid & Carry Handle

Ello Cooper is a 40oz double-walled, vacuum-insulated stainless steel water bottle with a locking straw lid and carry handle that keeps drinks cold and travels leak-free.

The Ello Cooper 40oz blends durable materials with an easy-sip straw lid and a secure locking cover designed for active days. Built from 18/8 stainless steel and finished with a tough powder coat, it’s engineered to resist rust and chipping while preserving cold beverages for extended periods. The locking dome protects the silicone spout during transit, and the integrated carry loop makes it simple to take along to work, workouts, or weekend adventures.

How long will this bottle keep my drink cold?

The Cooper uses a double-wall vacuum insulation system to slow heat transfer and maintain low temperatures. With cold-retention measured in many similar designs, you can expect your chilled drinks to remain refreshing through much of the day.

• Double-walled vacuum insulated interior reduces thermal exchange.
• 18/8 stainless steel resists heat conduction compared with single-wall bottles.
• Large 40oz capacity stores enough liquid for long outings without frequent refills.

Is the lid spill-proof and easy to drink from?

The locking dome lid secures the straw and prevents accidental openings, while the soft silicone spout offers a comfortable sip. The internal straw is BPA-free and removable so you can clean or replace it as needed.

• Locking mechanism keeps lid closed during transport for leak-free confidence.
• Silicone spout delivers a smooth, comfortable drinking experience.
• Top-rack dishwasher-safe lid components simplify cleaning; spout disassembles fully.

How durable and portable is this bottle for everyday use?

Cooper’s powder coat finish and stainless body are built to handle bumps and daily wear without corroding. The molded carry loop is sized for hand transport or clipping to a bag for hands-free carrying.

• 18/8 stainless steel core resists rust and maintains structural integrity.
• Durable powder coat minimizes chipping and improves grip.
• Integrated carry handle fits most fingers and bag clips for easy transport.

What cleaning steps keep the bottle performing well?

All lid parts are top-rack dishwasher safe for convenience, though handwashing the bottle body will prolong the powder coat and finish. The straw and silicone spout disassemble so you can reach crevices and prevent residue buildup.

• Disassemble spout and straw to clean hidden areas thoroughly.
• Lid components are top-rack dishwasher safe; handwash body to preserve finish.
• BPA-free materials make rinsing and washing straightforward.

Who is this for: The Ello Cooper 40oz suits anyone needing a single bottle to cover long days—commuters who want fewer refills, athletes and hikers who value cold hydration, or students and professionals who need a dependable, leak-resistant bottle in a stylish finish. If you prefer a large-capacity, easy-sip bottle with a secure locking lid and simple cleaning options, Cooper is designed to meet those needs without unnecessary complexity.