Don't end a dinner party by sending guests home with doggie bags fashioned out of empty cottage-cheese tubs. Instead, use plastic Translucent Take-Out Cartons ($1.50 for 16-ounce size, $2 for 24-ounce size: www.containerstore.com). They're good for leftover vegetables, cookies, or meats. (Avoid heavily sauced dishes, which will leak.)