Yumbox Presto Stainless Steel BentoYumbox Presto; it's the Yumbox ' but not as you know it. If you've been looking for a more sustainable alternative to Australia's favourite bento box, look no further. The brand new Yumbox Presto swaps plastic for stainless steel. It still offers absolute convenience in its moulded tray with pre portioned compartments. And it's still simple to use, thanks to Yumbox's child friendly single clasp. But Yumbox Presto is even easier to clean with no sneaky