Types of cardboard trays:

1. **Folded Carton Trays**: These trays are made from folded cardboard and are commonly used for packaging smaller items such as confectionery, cosmetics, and pharmaceutical products.

2. **Corrugated Cardboard Trays**: Corrugated cardboard trays are sturdier and more durable than folded carton trays. They are suitable for heavier items like fruits, vegetables, and electronic appliances. They provide better protection during transportation and storage.

3. **Display Trays**: These trays are designed for retail display purposes and are often used to showcase products on shelves or countertops. They come in various shapes and sizes and can be customized with branding and graphics.

4. **Die-Cut Trays**: Die-cut cardboard trays are custom-shaped trays that are cut and creased using a die-cutting machine. They are tailored to fit specific products and provide a snug and secure fit, minimizing movement during transit.

5. **Partition Trays**: Partition trays have dividers or partitions inside to separate and organize multiple items within the tray. They are commonly used for packaging bottles, jars, or other fragile items that need individual protection.

6. **Nesting Trays**: Nesting trays are designed to stack inside one another when empty, saving space during storage and transportation. They are convenient for bulk packaging and distribution.

7. **Hinged Lid Trays**: These trays come with a hinged lid attached, providing easy access to the contents while keeping them secure during transit. They are commonly used for packaging gift sets, electronics, and other high-value items.

8. **Shelf-Ready Trays**: Shelf-ready trays are designed to be placed directly onto retail shelves without the need for additional packaging. They often feature tear-off perforations or easy-open features for quick and convenient access to the products.

These are some of the common types of cardboard trays used for packaging various products, offering different features and benefits depending on the application.