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Key Specs

Container Material

Lid Material

BPA-Free

PFAS-Free Seal

Weck

Weck 743 Mold Jar (Set of 4)

#1 of 16 food storage containers tested

No sponsored placements·By Renée Torres

9.7R3 Score / 10

RecommendedWe'd buy this without hesitation.

No sponsored placements· By Renée Torres

The bottom line

What the product listing won't tell you

Know before you buy

Independent testing found lead in the exterior glass glaze (142-159 ppm) — this is on the outside of the jar, not on food-contact surfaces, but it triggers a California Prop 65 warning that families with young children should be aware of.

Buy it if

Borosilicate glass construction - completely chemically inert, zero coating concerns

Safety

Efficacy

Usability

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$39.99

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Skip if

California Prop 65 chemical exposure warning - review the specific substance before purchasing for daily family use

What's inside

Specs the product listing doesn't explain

Safety & Materials

What your food and family come into contact with every use

Container Material Lid Material BPA-Free PFAS-Free Seal Dishwasher Safe

Efficacy

What determines how well this performs its core job

Oven Safe

Usability

Ease of use, maintenance, and longevity

Seal Type Stackable Price

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How we scored it

3 criteria - open any layer to see exactly what we found

Safety

Efficacy

Usability

Material SafetyCritical

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Criteria

Where to buy

Verified retailer - current pricing

Starting price

$39.99

R3 approved retailer Score unaffected by purchase

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#1 of 16 food storage containers reviewed

Did the Weck 743 Mold Jar (Set of 4) pass our safety screen?

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Container Body Material

Lid Material

BPA-Free

PFAS-Free Lid Seal

PerformanceImportant

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The scoring rationale is locked

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Criteria

Oven-Safe Maximum Temperature Seal Type

UsabilityNice to have

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The scoring rationale is locked

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Criteria

Dishwasher Safe Lid Mechanism Ease Stackable Design