Product detailsDishwasher safe, Freezer safe and Microwave safeSilicon containers do not contain the Estrogen and harsh chemicals, silicon is the best choice currently available. Silicon is indisputably safer for human health than plastic, which is a petroleum-based material commonly containing estrogen-mimicking chemicals like bisphenol-A (BPA). Furthermore, when it comes to the environment, silicon is more durable and environmentally friendly than plastic. Silicon is much longer lasting than plastic and endures extreme fluctuations in temperatures???from very cold to oven hot ? without melting, cracking or otherwise degrading.Silicon resists oxidative deterioration (normal aging) for decades on end. Silicon (unlike plastic) is converted back into inorganic amorphous silica, carbon dioxide and water vapour. Still curious about the benefits of silicon as compared to plastics? Silicon is also odour and stain resistant. It?s hygienic and hypoallergenic with no open pores to harbor bacteria making it great for food containers and lunch ware. It does not fade or scratch.Silicone is Non-toxicSilicon containers do not contain the Estrogen and harsh chemicals, silicon is the best choice currently available. Silicon is indisputably safer for human health than plastic, which is a petroleum-based material commonly containing estrogen-mimicking chemicals like bisphenol-A (BPA). Furthermore, when it comes to the environment, silicon is more durable and environmentally friendly than plastic. Silicon is much longer lasting than plastic and endures extreme fluctuations in temperatures???from very cold to oven hot ? without melting, cracking or otherwise degrading.Silicon resists oxidative deterioration (normal aging) for decades on end. Silicon (unlike plastic) is converted back into inorganic amorphous silica, carbon dioxide and water vapour. Still curious about the benefits of silicon as compared to plastics? Silicon is also odour and stain resistant. It?s hygienic and hypoallergenic with no open pores to harbor bacteria making it great for food containers and lunch ware. It does not fade or scratch.