
Milk crates are square or rectangular interlocking boxes used to transport milk and other products from dairies to retail establishments. The plastic milk crate was invented in Australia in the 1950s and 1960s by the Dairy Farmers Cooperative Milk Company. Milk crates are made of industrial-grade plastic, often with steel ring reinforcement, and can be made from 100% recycled materials. The plastic used is typically petroleum-derived high-density polyethylene (HDPE), with some crates made of polypropylene (PP). Theft of milk crates is a significant problem for the dairy industry, costing thousands of dollars annually, as the price of crates rises and falls with the price of oil.
| Characteristics | Values |
|---|---|
| Material | Rigid plastic, HDPE, industrial-grade plastic |
| Durability | Long-lasting, durable, strong, stackable |
| Size | 19 x 13 x 11", 12 x 12 x 10.5", 19" x 13" x 11" |
| Weight | 4.5 lbs |
| Colour | Black |
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What You'll Learn
- Milk crates are made from heavy-duty polyethylene or HDPE
- They are often stolen for personal use, business use, or for their plastic
- Plastic milk crates are an Australian invention, designed in the 1950s and 1960s
- They are square or rectangular interlocking boxes used to transport milk and other products
- Plastic manufacturers market milk crates as storage containers for consumers

Milk crates are made from heavy-duty polyethylene or HDPE
The use of heavy-duty polyethylene in milk crates is a relatively recent development, with the Dairy Farmers Cooperative Milk Company in Australia experimenting with the material in the 1950s and 1960s. Prior to this, milk crates were made from wood or stainless steel. The switch to polyethylene was driven by the need for a more durable and cost-effective solution.
Polyethylene milk crates are known for their sturdiness and longevity. They are often described as thick and well-built, capable of withstanding significant weight without breaking. This durability has made them popular beyond their original purpose, with people using them for storage, transportation, and even decor.
The heavy-duty nature of the polyethylene used in milk crates contributes to their strength and impact resistance. This type of polyethylene is different from the softer, more flexible polyethylene used in plastic bags, for example. The manufacturing process, which involves moulding the polyethylene into the desired shape, also contributes to the overall strength of the final product.
Overall, the use of heavy-duty polyethylene in milk crates has revolutionised the dairy industry, providing a cost-effective, durable, and versatile solution for the transportation and storage of milk and other goods. The durability and strength of this material have also contributed to the popularity of milk crates in various other applications, showcasing the versatility of this plastic beyond its original intended purpose.
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They are often stolen for personal use, business use, or for their plastic
Milk crates are made of highly durable plastic called high-density polyethylene, which is derived from petroleum. The price of this plastic fluctuates with the price of oil, and milk crates can cost dairies around $4 to $7 per crate. Theft of milk crates can cost the dairy industry millions of dollars per year, with dairy companies losing an estimated $80 million per year from stolen crates, which equates to around 20 million milk crates.
Milk crates are often stolen for personal or business use, or for the plastic they are made from. They are highly versatile and can be used for storage, fishing, furniture, or gardening. They are also stackable and can be modified to create bookshelf-like storage compartments. The plastic milk crates are also durable and do not break down in severe weather conditions, making them a desirable item.
Theft of milk crates is illegal and is taken very seriously by the dairy industry and law enforcement. It is considered stealing and can result in fines ranging from $200 to $1,000, or even a short jail sentence in some cases. The laws regarding milk crate theft vary from state to state, with some states criminalizing the unauthorized use, possession, or disposal of milk crates belonging to another company.
The high rate of milk crate theft has led to increased fines and penalties for first-time misuse, trafficking, or destruction of milk crates. In Maryland, for example, the state legislature passed bills to make it harder to sell stolen milk crates to plastic recyclers and increased penalties. The dairy industry has also taken measures to address the issue, with some dairies hiring private investigators to discover what is happening to the stolen crates.
To avoid legal issues, it is important to purchase milk crates directly from the manufacturer or retailer instead of taking them from outside stores or off the street. Milk crates are affordable and can be bought from the manufacturer at a very reasonable price, so there is no need to resort to theft.
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Plastic milk crates are an Australian invention, designed in the 1950s and 1960s
Prior to the introduction of plastic milk crates, crates in the middle of the 20th century were made of wood, while later ones were made of stainless steel. The plastic milk crates that emerged in the latter part of the century were made of heavy-duty polyethylene.
Today, milk crates are typically made of industrial-grade plastic with a steel ring reinforcement, ensuring they are built to last a lifetime. They are designed to withstand extreme weight and demanding conditions.
The most common milk crate sizes are designed to carry several 1-US-gallon (3.8L) milk jugs. Their dimensions are typically around 12 inches by 12 inches, with a height of about 10.5 inches, but this can vary.
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They are square or rectangular interlocking boxes used to transport milk and other products
Milk crates are square or rectangular interlocking boxes used to transport milk and other products from dairies to retail establishments. They are made of plastic and are stackable, with some having steel ring reinforcement. The plastic milk crate is an Australian invention, designed by the Dairy Farmers Cooperative Milk Company in the 1950s and 1960s.
The standard size of a milk crate is 19 x 13 x 11 inches, with a weight of 4.5 lbs. They are often used for storage and transportation in various industries, including the film industry, where they are known as the "Milk Crate - Motion Picture Industry Standard". This standard was created to meet the need for carrying multiple items in a single container while staying organized.
Milk crates are also commonly used for personal storage and decor. They are available in a variety of colours, shapes, and sizes, and can even be customized with hot-stamping and molded-in logos. They are known for their durability and versatility, making them a popular choice for both industrial and home use.
Theft of milk crates can be a significant issue for dairies, costing them millions of US dollars per year. This has led to some dairy farms hiring private investigators to track down the missing crates, with plastic re-sellers often being identified as the culprits. Despite this, milk crates remain a popular and widely-used product for both commercial and personal purposes.
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Plastic manufacturers market milk crates as storage containers for consumers
Milk crates are square or rectangular interlocking boxes that are used to transport milk and other products from dairies to retail establishments. The plastic milk crate is an Australian invention, produced through a period of trial and error in design by the Dairy Farmers Cooperative Milk Company in the 1950s and 1960s. The most common milk crate sizes are designed to carry several 1-US-gallon (3.8 L; 0.83 imp gal) milk jugs. Some 12 in × 12 in (300 mm × 300 mm) milk crates have a height of 10+1⁄2 in (270 mm), but this may vary.
Starting in the 1970s, some plastic manufacturers began marketing milk crates as storage containers for consumers for use in personal storage or decor. These products competed with higher-end proprietary modular plastic storage cube systems, such as the Finnish "Palaset" line marketed by Design Research. The consumer-grade storage crates varied widely in price, quality, and sturdiness compared to their commercial counterparts. The basic milk crate stackable design was often modified to also allow stacking with the openings facing sideways rather than upwards, thus creating a bookshelf-like set of storage compartments. Similar products remain on the market today.
Milk crates are often stolen for either personal or business use or for the plastic that they are made out of. Theft of milk crates can cost dairies millions of US dollars per year. This has led to at least one dairy farm hiring a private investigator to discover what is happening to the crates; the results of investigations point to plastic re-sellers being the culprits in the majority of thefts.
Today, companies like Farmplast manufacture and supply milk crates direct from their factory in New Jersey. They offer customers the option to purchase personalized milk crates with hot-stamping and molded-in logos. These customizations can make the milk crates unique to a customer's business and help with marketing. Farmplast manufactures its milk crates in-house using the finest quality resins and in accordance with the latest industry standards. They are available in a wide range of colors, shapes, and sizes, and are versatile and affordable.
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Frequently asked questions
Milk crates are made of heavy-duty polyethylene, a type of rigid thermo-plastic mesh.
No, middle-20th-century milk crates were made of wood, and later ones were made of stainless steel.
Plastic milk crates are more durable and long-lasting than their wooden or steel counterparts. They are also stackable, which makes them convenient for storage and transportation.
Plastic milk crates are susceptible to theft, which can cost dairies millions of dollars per year.
The most common milk crate sizes are designed to carry several 1-US-gallon (3.8 L; 0.83 imp gal) milk jugs. Some standard dimensions are 12 in x 12 in (300 mm x 300 mm) with a height of 10+1⁄2 in (270 mm).











































