Possibly something of a throwback to your schooldays with the Adidas Originals Adicolor holdall.
Yes, a big chunky holdall, the kind of thing that was popular on the schoolyard in the 80s and stays useful today for anything from the gym to a night away with that hefty capacity. That white on black colour scheme is particularly stylish (especially with the Adidas and Trefoil detailing), while the polyurethane construction should make it useful in all weather.
£55 will secure you one. Another angled image is over the page.