Pyrex Glass Food Storage Containers vs. Stasher Reusable Silicone Bag

Materials

• Tempered soda-lime glass
• Plastic or silicone lids

Common claims

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

Concerns / watch-outs

• Modern Pyrex sold in the US uses tempered soda-lime glass, not borosilicate — more susceptible to thermal shock than older versions
• Plastic lids may contain BPA; look for confirmed BPA-free lids or use silicone alternatives

Notes

Pyrex glass is one of the most recommended non-toxic food storage options. The glass body is completely inert. Replace plastic lids if they become scratched or stained.

Cleaner alternatives

• borosilicate glass container
• mason jar

Materials

• 100% platinum food-grade silicone

Common claims

• Leakproof
• Dishwasher, microwave, and freezer safe
• BPA and BPS-free

Concerns / watch-outs

• Higher cost than conventional silicone bags; worth verifying the 100% platinum silicone claim

Notes

Stasher is the most well-known platinum silicone bag brand. The 100% platinum silicone construction is one of the inert food-contact materials available for flexible storage.

Cleaner alternatives

• silicone storage bag
• stainless steel food container