Striped Ocean Foam
Comes with an extendable strap feature (to enable bottle to be tied around the body and worn hands-free).
Paired with a YuYu biodegradable rubber bottle (optional)
Stays warm for 4-6 hours.
Requires less than a kettle of water to fill up (less than 1 litre), cleverly designed bumps on the surface of the bottle trap air within the fabric making it stay warmer for longer.