A perfect box to take your lunch to work: 1 glass bowl of 600ml or 450 ml (freezer safe, with a silicone lid). A wood fiber shell makes the glass safe and also allows you to microwave it without burning your fingers. Its lid is made of stainless steel.
100 % waterproof
Microwaveable (the wood fiber shell but not the steel lid)
oven-proof (glass bowl and silicone, not the shell and cover)
go into the freezer