This way the food will be kept cold while you hike. On the other hand, many backpackers choose foods that do not require refrigeration. Canned meat, poultry, and fish although heavy are good choices. Concentrated juice boxes are also handy but heavy. Check with an outdoor supply store for foods packaged especially for backpacking.
Water is always an important consideration on a hiking trip.
You ll need it for preparing foods as well as for washing up. Purchase purification tablets or equipment from camping supply stores, and learn purification techniques. You may wish to bring along some bottled water. Cleanliness is essential. Pack soap for hand washing and dishwashing.