The CoolZÜCA Cooler is designed to fit perfectly inside a ZÜCA Sport.
It will also sit nicely on top and has straps on the back to fasten it to the handle.

CoolZÜCA will hold an entire case of standard 12oz beverage cans. It
has a high-tech aluminized mylar heat shield which somehow knows
how to keep stuff hot or cold and a closed-cell polyethylene thermal
barrier.

A zip-in liner can be removed for hand washing and keeps the
CoolZÜCA from leaking (as long as it is upright).
The insulated removable floor panel allows the CoolZÜCA to fold up,
and provides a shelf when needed to keep food away from wet cans
and ice. The hatch opens for easy access in or out of the ZÜCA.
Includes handle and shoulder strap.