What materials are milk bottles made of?

Traditional:

* Glass: This was the standard material for milk bottles for many years. It's durable, reusable, and recyclable.

Modern:

* Polyethylene Terephthalate (PET): This type of plastic is common for single-use milk bottles. It's lightweight, shatterproof, and recyclable.

* High-Density Polyethylene (HDPE): Another type of plastic used for milk bottles, especially for larger sizes. It's strong, durable, and recyclable.

* Polyethylene (PE): This type of plastic is often used for milk jugs. It's flexible, lightweight, and recyclable.

Less Common:

* Polypropylene (PP): Used for some milk bottles and jugs. It's heat-resistant and recyclable.

* Polystyrene (PS): Occasionally used for milk bottles, though not as common due to environmental concerns. It's lightweight and recyclable, but not widely accepted for recycling.

The specific material used for milk bottles will depend on the manufacturer, the size of the bottle, and the intended use.