HDPE Plastic Food Container (#2) vs. Styrofoam / Polystyrene Food Container

Materials

• High-density polyethylene (HDPE, recycling #2)

Common claims

• BPA-free
• Dishwasher safe
• Lightweight

Concerns / watch-outs

• HDPE is one of the safer plastics but can still leach additives at elevated temperatures
• Avoid microwaving or storing hot food — cold and room temperature use is lower risk

Notes

Among the safer plastic types for cold food storage. Avoid heat and replace if cracked or scratched, as degraded surfaces leach more readily.

Cleaner alternatives

• stainless steel food container
• borosilicate glass container

Materials

• Expanded polystyrene (EPS, recycling #6)

Common claims

• Lightweight insulation
• Cost-effective packaging

Concerns / watch-outs

• Styrene — the building block of polystyrene — is classified as a possible human carcinogen (IARC Group 2B)
• Leaches styrene into fatty or hot foods
• Essentially non-recyclable and environmentally persistent

Notes

One of the worst food contact materials for both health and environmental impact. Avoid using for hot or fatty foods. Opt out whenever possible in favor of glass, stainless, or even HDPE.

Cleaner alternatives

• borosilicate glass container
• stainless steel food container
• paper lunch bag