Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to keep food cold [title] Choose a cooler made from insulation material suited to your needs. [step] Styrofoam coolers are the cheapest and lightest, although also less effective than other options. Plastic and metal are the next step up, with the former great for camping trips and the latter sturdy enough for fishers and hunters.

Ending1: Choose high quality insulation that has been soaked into form to support your preferred weather conditions. [substeps] Wooden coolers are the most popular, but woods tend to be more expensive. Ending2: [substeps] Recognize that materials like plastic and metal tend to be more flexible and easier to hold, even in extreme cold. [title] Don't set the cooler in a sleeping area with fluorescent light bulbs. Ending3: [title] Bring one single cell phone, if possible. [step] If you are hunting in heavily forested areas, you are not really relying on the fully-enclosed cooler. Ending4: Electric coolers are the most expensive, but eliminate the need for ice. [substeps] Purchase a cooler that works with dry ice for greater flexibility.

Answer format: ending1/ending2/ending3/ending4