When preparing lunches for your children (or anyone), try “drinkable” ice packs: Fill a 12-ounce plastic bottle about halfway with drinking water and freeze it overnight, tilting the bottle so the water will freeze at an angle (if you freeze it straight up, the expanded water will make the bottle bulge). Next morning pack the lunch, add more drinking water to the bottle, and stick it in the lunch box to keep the food cool and be melted enough to drink by lunchtime.