Ello Cooper 40oz Stainless Steel Water Bottle — Vacuum-Insulated, Leak‑Proof Lid with Straw

The Ello Cooper 40oz stainless steel water bottle is a double-walled, vacuum-insulated reusable bottle with a soft silicone straw, locking leak-proof lid, and carry handle built for all-day cold drinks.

Designed for everyday use, travel, and active lifestyles, the Cooper combines durable 18/8 stainless steel construction with a powder-coated finish, a removable straw, and a secure locking dome to keep your beverage protected and easy to sip. Available in multiple sizes (18oz, 22oz, 32oz, 40oz), this model focuses on maximum capacity and long-lasting cold retention while remaining portable thanks to the integrated carry loop.

How long will the Cooper keep my drink cold?

The Cooper uses double-wall vacuum insulation to limit heat transfer, keeping drinks cold for extended periods. It’s engineered to maintain low temperatures significantly longer than single-wall bottles.

• Cold retention up to 24 hours under typical conditions.
• Double-walled vacuum barrier prevents condensation on the exterior.
• Wide mouth for ice and easy filling.

Is the lid truly leak-proof and travel safe?

The bottle features a locking dome lid with a snap-lock mechanism that secures the soft silicone spout and straw, reducing the risk of accidental spills. The seal is designed for tossed-in-bag convenience and commuting.

• Locking feature prevents unintentional opening during transport.
• Leak-proof gasket inside the lid for reliable sealing.
• Carry handle integrates into the lid for comfortable hand or clip attachment.

How do I clean and maintain the Cooper bottle?

All parts of the Cooper are top-rack dishwasher safe, but handwashing the stainless steel body helps preserve the powder coat and finish. The silicone spout and straw disassemble fully for thorough cleaning.

• Spout and straw detach for spot-free cleaning of crevices.
• Top-rack dishwasher safe lids; handwash recommended for body longevity.
• BPA-free internal components for safe, repeated use.

Will the 40oz fit my everyday carry or car cup holder?

The 40oz Cooper is built for maximum hydration rather than cup-holder compatibility. For those needing cup-fit convenience, smaller Cooper sizes (18oz or 22oz) are designed to match most car cup holders while still offering similar features.

• 40oz provides long outings or full-day hydration without frequent refills.
• 18oz and 22oz sizes are car cup compatible for commuting.
• Integrated carry loop makes the larger bottle easier to transport by hand or clip.

Who is this for: The Ello Cooper 40oz is ideal for active people, long-shift workers, outdoor enthusiasts, students, and anyone who prefers a single large-capacity bottle to minimize refills. If you want a durable, insulated bottle with a soft straw, secure locking lid, and easy-to-clean design, the Cooper offers a practical, stylish solution for daily hydration needs without compromising portability.