Lower Production Cost: Plastic is generally much cheaper to produce than glass or metal. The raw materials and manufacturing processes (like injection molding) are highly efficient and scalable.
Benefit for Brands: This allows for a lower final product price, making creams accessible to a wider market. It also increases profit margins.
Shatterproof: Unlike glass, plastic jars will not break if dropped. This is a major safety advantage in bathrooms and during handling.
Benefit for Everyone: Reduces risk of injury, prevents product loss from breakage, and minimizes damage during shipping and transport. This is crucial for both brands (lower shipping losses) and consumers (safer use).
Plastic is significantly lighter than glass or ceramic.
Benefit: Drastically reduces shipping costs for manufacturers. For consumers, it makes the product highly portable and convenient for travel (and often meets airline carry-on weight restrictions).