Photo by WUR

Plastic trays (containers/crates)

Plastic trays (containers/crates) may withstand heavy load better than single-use packaging. They allow an easy and neat stacking, though this should be done with care. The trays can be packed with product in bulk or packed with smaller units such as punnets.

Avocados packed in large plastic crates for storage and transport. Photo by WUR
Avocados packed in large plastic crates for storage and transport. Photo by WUR

Plastic trays

The plastic trays offer protection during storage and transport. The trays can be stacked easily. They are available in different colours and sizes to match the size of the pallet. Firm fruit, such as avocados before ripening, can be delivered in relatively large crates.
Green folding trays in Europe are available in several sizes. Photo by WUR.
Green folding trays in Europe are available in several sizes. Photo by WUR.

Folding trays

Often seen in Europe are the green or other coloured folding trays of the Euro Pool System (EPS). They fold and unfold with a simple mechanism. They are available in different sizes. The crates are washed after use and returned to the growers
Blueberries packed in bulk in plastic crates. Photo by WUR
Blueberries packed in bulk in plastic crates. Photo by WUR

Packed as bulk

Product may be packed as bulk in crates. The crates are tailored to the nature of the product. Especially soft fruit should not lie in a too thick layer. Due to the weight of the upper fruits, the lower fruits can otherwise be damaged
A plastic crate filled with smaller units for red currant. Photo by WUR.
A plastic crate filled with smaller units for red currant. Photo by WUR.

Tray with multiple units

A plastic tray can also be used to contain smaller packages. These packages, such as punnets, may of course not protrude above the top of the tray. This would damage the product when another tray is placed on top of it.

Example of the bottom of a plastic tray with edges that can damage the product if used incorrectly. Photo by WUR.
Example of the bottom of a plastic tray with edges that can damage the product if used incorrectly. Photo by WUR.

Prevent damage caused by the tray

The tray should not be overfilled. Most types of crates have an edge at the bottom outside for easy stacking. When stacking, the tray drops a little into the tray underneath. The tray must not touch the product in the tray underneath. Pay attention to possible product damage if this does happen.
Attention!  A damaged crate can cause product injuries. Photo by WUR
Attention! A damaged crate can cause product injuries. Photo by WUR

Damaged trays

Crates with sharp edges can cause damage to the fresh products. Foam inserts or paper inserts on the bottom of the crates are used to reduce impact damage.
Attention! This bell pepper shows a clear mark of the crate caused by pressure. Photo by WUR
Attention! This bell pepper shows a clear mark of the crate caused by pressure. Photo by WUR

Damage caused by the crate

Crates with sharp edges can cause damage to the fresh products. Foam inserts or paper inserts on the bottom of the crates are used to reduce impact damage.

Asparagus continuing to grow in a crate. Photo by Kaca Skokanova/Shutterstock.com
Asparagus continuing to grow in a crate. Photo by Kaca Skokanova/Shutterstock.com

Correct crate size

The right crate size is important. Products should not be forcefully packed in order to fit. Asparagus can still develop (grow) after harvest, especially if low temperature has not been controlled optimally. This means that asparagus which were packed tightly could later be forced to bent if the asparagus tips reach the crate edges.