# HDPE: properties and identification clues

Canonical: https://materiumapp.com/materials/hdpe/

By Materium. Published 2026-10-19. English.

HDPE means high-density polyethylene. It is a versatile plastic used in bottles, household products and other moulded items. Its formulation and thickness can produce different appearances, which makes the product’s markings especially helpful.

- Full name: High-density polyethylene
- Packaging resin code: 2 — HDPE
- Common examples: Milk bottles and cleaning-product bottles

## What to look for

Look for HDPE or a number 2 on the base. Record the handle, neck, wall appearance and closure. An uncoloured bottle may look milky or translucent; pigments and wall thickness can change this appearance.

## Make a useful comparison

HDPE and PET bottles can serve different packaging needs. Start a comparison with declared material markings rather than colour alone. The bottle cap and label may be different materials from the body.

## Explore it with Materium

Use a clean, empty household bottle as a reference. Photograph its base and overall shape, explore it with Materium, and compare the assessment with the moulded declaration. Keep any separate component markings in your notes.

[How Materium works](https://materiumapp.com/how-materium-works/). Reference sources are separate from the app’s generated analysis.

## Care, reuse and recycling context

Check local instructions for the actual bottle or item. A collector’s acceptance of HDPE bottles does not automatically extend to every HDPE product. Follow the on-pack preparation and closure instructions where provided.

## Related materials

- [PET](https://materiumapp.com/materials/pet/)
- [Polypropylene](https://materiumapp.com/materials/polypropylene/)

## Sources

Sources checked 2026-10-19.

- [British Plastics Federation — HDPE properties and uses (industry reference)](https://www.bpf.co.uk/plastipedia/polymers/HDPE.aspx)
- [Recycle Now — packaging symbols and local collection (UK)](https://www.recyclenow.com/how-to-recycle/recycling-symbols)

Educational content prepared with AI assistance. [Editorial policy](https://materiumapp.com/editorial/).

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