Frozen food in the context of "Cold chain"

Food spoilage is the process whereby food becomes unsuitable to ingest by a person; it is a matter of food safety. Bacteria and various fungi are the causes of spoilage, and can create serious consequences for consumers, but there are preventive measures that can be taken. The precise cause of the process is due to many outside factors as a side-effect of the type of product it is, as well as how the product is packaged and stored.

Food spoilage is the reason for food preservation, to extend shelf life. Meat is processed, food is frozen, and food is canned. Due to spoilage, one-third of the world's food produced for human consumption is lost every year.

Convenience food (also called tertiary processed food) is food that is commercially prepared (often through processing) for ease of consumption, and is usually ready to eat without further preparation. It may also be easily portable, have a long shelf life, or offer a combination of such convenient traits. Convenience foods include ready-to-eat dry products, frozen food such as TV dinners, shelf-stable food, prepared mixes such as cake mix, and snack food. Food scientists now consider most of these products to be ultra-processed foods and link them to poor health outcomes.

Bread, cheese, salted food and other prepared foods have been sold for thousands of years, but these typically require a much lower level of industrial processing, as reflected in systems such as the Nova classification. Other types of food were developed with improvements in food technology. Types of convenience foods can vary by country and geographic region. Some convenience foods have received criticism due to concerns about nutritional content and how their packaging may increase solid waste in landfills. Various methods are used to reduce the unhealthy aspects of commercially produced food and fight childhood obesity.

Dry ice is the solid form of carbon dioxide. It is commonly used for temporary refrigeration as CO₂ does not have a liquid state at normal atmospheric pressure and sublimes directly from the solid state to the gas state. It is used primarily as a cooling agent, but is also used in fog machines at theatres for dramatic effects. Its advantages include lower temperature than that of water ice and not leaving any residue (other than incidental frost from moisture in the atmosphere). It is useful for preserving frozen foods (such as ice cream) where mechanical cooling is unavailable.

Dry ice sublimes at 194.7 K (−78.5 °C; −109.2 °F) at Earth atmospheric pressure. This extreme cold makes the solid dangerous to handle without protection from frostbite injury. While generally not very toxic, the outgassing from it can cause hypercapnia (abnormally elevated carbon dioxide levels in the blood) due to a buildup in confined locations.

A refrigerator, commonly shortened to fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the ambient temperature of the room. Refrigeration is an essential food storage technique around the world. The low temperature reduces the reproduction rate of bacteria, so the refrigerator lowers the rate of spoilage. A refrigerator maintains a temperature a few degrees above the freezing point of water. The optimal temperature range for perishable food storage is 3 to 5 °C (37 to 41 °F). A freezer is a specialized refrigerator, or portion of a refrigerator, that maintains its contents' temperature below the freezing point of water. The refrigerator replaced the icebox, which had been a common household appliance for almost a century and a half. The United States Food and Drug Administration recommends that the refrigerator be kept at or below 4 °C (40 °F) and that the freezer be regulated at −18 °C (0 °F).

The first cooling systems for food involved ice. Artificial refrigeration began in the mid-1750s, and developed in the early 1800s. In 1834, the first working vapor-compression refrigeration system, using the same technology seen in air conditioners, was built. The first commercial ice-making machine was invented in 1854. In 1913, refrigerators for home use were invented. In 1923 Frigidaire introduced the first self-contained unit. The introduction of Freon in the 1920s expanded the refrigerator market during the 1930s. Home freezers as separate compartments (larger than necessary just for ice cubes) were introduced in 1940. Frozen foods, previously a luxury item, became commonplace.

Mashed potato or mashed potatoes (American, Canadian, and Australian English), colloquially known as mash (British English), is a dish made by mashing boiled or steamed potatoes, usually with added milk, butter, salt, and pepper. It is generally served as a side dish to meat or vegetables. Roughly mashed potatoes are sometimes called smashed potatoes. Dehydrated instant mashed potatoes and frozen mashed potatoes are available. Mashed potatoes are an ingredient in other dishes, such as dumplings and gnocchi.

A seafood restaurant is a restaurant that specializes in seafood cuisine and seafood dishes, such as fish and shellfish. Dishes may include freshwater fish. The concept may focus upon the preparation and service of fresh seafood, (as opposed to frozen products). Some seafood restaurants also provide retail sales of seafood that consumers take home to prepare. Seafood restaurants may have a marine-themed decor, with decorations such as fish nets, nautical images and buoys. Fare can vary due to seasonality in fish availability and in the fishing industry. Seafood restaurants may offer additional non-seafood items, such as chicken and beef dishes.

Pizza rolls are a frozen food product consisting of bite-sized breaded pizza pockets with an interior of tomato sauce, cheese or cheese analogue, and various pizza toppings. They are sold in a variety of flavors including cheese, pepperoni, sausage, supreme, multiple imitation cheeses, and mixed meats. Other flavors include hamburger, cheeseburger, ham and cheese, and combination (pepperoni and sausage). Pizza snack rolls are designed to be quickly cooked in the oven or microwave. The name "pizza rolls" is a trademark of General Mills, current owner of the original product, currently sold under the Totino's brand.

Similar products are made by other brands and private labels. Since the original name is trademark protected, different names are used such as pizza bites, pizza snacks, or pizza poppers.