I was sceptical about all of the claims made for these. Stain resistant, leak resistant ect ect. I pack my boyfriend's lunch for work everyday, and he is picky, he loves chili, which I had made for dinner and decided to send in his lunch, you know, go big or go home.  Welllllll they ARE stain resistant, they ARE leak resistant, AND he said it heat more quickly and evenly. Guess who is getting all new tupperware?? If he is smart it won't be for Valentine's day though!