Kimberly's got a great lunchbox tip:
We all have several of the dosing cups that come with our children's medicines tucked away in a drawer somewhere. I've come up with a great re-purpose idea for them: if you pack sandwiches in your lunches, but don't like putting condiments on them until you're ready to eat, these little medicine measuring cups are the perfect size. Fill a medicine cup with whatever condiments you like and then cover with plastic wrap and pack it in your lunch. No more soggy sandwich bread! This is also an excellent way to carry salad dressing for your salads.
Re: the plastic wrap choice — have you ever tried Glad Press 'n Seal? It's expensive, but for times when the tightness of the seal is more important than the overall coverage area, I find that it works really well.