MasterClass Eco-Snap sets a new standard for eco-savvy storage. The containers ultra-transparent look gives the impression of glass, but the Eastman Tritan??? copolyester these were engineered with is even stronger and more shatterproof. With a snap-locking closing system, you can be sure that, whether you're using them for strawberries or as cereal storage tubs, your food will remain fresher than in a regular food container. The boxes come in four convenient shapes and sizes. There's one 800ml square container, one 800ml rectangular container, one 1. 5-litre square container, and one 1. 4-litre rectangular container. The fact that they're microwave friendly also means they're a well-rounded food container set. All you need to do is make sure that the steam vent is open first. They're BPA-free, as well as odour and stain resistant.