Or an insulated vacuum bottle works well, too. Deli sandwiches, yogurt, and cheese among others. Keep your raw vegetables in the cooler, too, to keep them crisp. Take a short walk. When you're hungry, stop to eat your lunch or dinner.
Bigger portions mean more calories, and likely more fat, cholesterol and sodium.
Look for variety in your order. Select a side order of salad, or raw vegetables for vitamins A and C and fiber. On sandwiches and salads, go easy on fat-laden condiments. Also included are other concerns that warrant attention and action for travelers, such as dehydration and food safety. The 70,000-member American Dietetic Association is the nation's largest organization of food and nutrition professionals.