LDPE Zip-Lock Plastic Bag (#4) vs. Glass Food Storage with Snap Lids

Materials

• Low-density polyethylene (LDPE, recycling #4)

Common claims

• BPA-free
• Leakproof zipper
• Freezer safe

Concerns / watch-outs

• Single-use at scale generates significant plastic waste
• LDPE can release additives when in contact with fatty or hot foods

Notes

LDPE is one of the safer single-use plastics, but the environmental footprint and single-use nature make reusable alternatives a better everyday choice.

Cleaner alternatives

• silicone storage bag
• stainless steel food container
• beeswax food wrap

Materials

• Borosilicate glass
• BPA-free plastic snap lids

Common claims

• Oven, microwave, and freezer safe
• Non-porous glass
• BPA-free lids

Concerns / watch-outs

• Lids are typically polypropylene (PP) — avoid microwaving with lid on
• Glass can break if dropped on hard floors

Notes

Best practice for food storage. Glass body is completely inert. Just don't microwave with the plastic lid on to avoid leaching.

Cleaner alternatives

• pyrex glass containers
• anchor hocking glass