Stores that sell dry ice include Safeway, Walmart, and Costco.  Plan to pick up dry ice as close to the time you will need it as possible.  Since it is constantly changing from solid to gas, it has a very short shelf-life.  Every 24 hours, 5-10 pounds of dry ice turns from a solid to a gas.  Though most people can buy dry ice, some stores will require you to be at least 18 years of age in order to purchase it. Performing school experiments and creating fog effects both require blocks of dry ice.  Dry ice also comes in pellet form but is mainly used for dry ice blasting to clean surfaces, or for medical transportation. The price of dry ice ranges anywhere from $1.00 to $3.00 per pound.  Though prices vary based on amount and location, it generally tends to be cheap. Since dry ice is much colder than traditional freezing containers (-109.3 degrees Fahrenheit which is  -78.5 degrees Celsius), it won't be kept cool by your average freezer or refrigerator.  The thicker insulated your cooler or ice chest is, the slower the dry ice will sublimate. Open and close the container as little as possible to slow down the sublimation process.  You can also fill the open space in the cooler with wadded paper to limit dead space and slow down sublimation as well.  Storing dry ice in the freezer may actually shut off your freezer's thermostat.  Since dry ice is extremely cold, your freezer will shut off to keep foods from over-freezing.  Consequently, if your freezer breaks down and you need to keep the food inside frozen, you can put dry ice inside and it will act as a substitute. Remember, dry ice is carbon dioxide and is harmful if inhaled in large quantities. Fresh air is especially important if you are transporting dry ice for longer than 15 minutes.  Being in a poorly ventilated area with dry ice can cause rapid breathing and headaches and can be lethal if breathed over long periods.
اشترِ الثلج الجاف عن طريق بعض الموردين أو الشركات والمصانع التي تقوم بإنتاجه. اشترِ الثلج الجاف في صورة قوالب أو كتل أو كريات صغيرة. احفظ الثلج الجاف في أوعية معزولة حراريًا، مثل: استخدم الثلج الجاف في تلطيف الجو.