The MASTERSEAL TO GO keeps food fresh longer thanks to the freshness seal It is also 100 % leak-proof, hygienic and safe 100% mobile : with pratical inserts and additional functions, they adapt to every kind of use Compatible microwave, freezer and dishwasher safe 100% Polyamid Container with practical inserts to keep food separate on the go 100% leak-proof design avoids any accidental spillages on the go Dishwasher, microwave and freezer friendly