Compare Food Storage Containers
Which scores higher on safety? R3 breaks it down.
The most important dimensions, side by side.
Safety Context
Here's what our analysis flagged on the safety front - not to alarm you, but because this is exactly the kind of detail that's hard to find in a spec sheet.
Caraway
No active safety flags in our analysis.
Weck
Active Prop 65 warning
California requires this disclosure when a product contains substances on its list - it doesn't mean it's unsafe, but it's worth factoring in for families with young children.
Safety flags affect scores - safety is the highest-weighted pillar in our scoring system. If a product has an active Prop 65 warning, that's reflected in its safety pillar rating above. The comparison above shows exactly where the gap lives.
Borosilicate glass is the safest food-contact material available — chemically inert with zero risk of leaching chemicals into your food at any temperature.
Made from soda-lime glass — the same chemically inert material used in Pyrex Simply Store. Nothing migrates from glass into your food, regardless of temperature or acidity. The only reason it doesn't score a perfect 10 is that borosilicate glass handles extreme temperature changes slightly better, but for food storage that distinction is negligible.
The silicone lid seals are FDA-approved and free of BPA, PFAS, and PTFE — the cleanest lid material profile in this category.
The lid is glass — not plastic — with a natural rubber gasket for the seal. This is the safest lid architecture available in food storage. No plastic anywhere in the lid system, no coatings, no chemical migration concerns.
Confirmed BPA-free by brand, which is expected for a glass-and-silicone design — no plastics touch your food.
There is literally no plastic in this product — glass, natural rubber, and stainless steel. BPA-free isn't a marketing claim here, it's a physical fact of the materials used.
Caraway is one of the few brands in this category to claim PFAS-free status backed by third-party testing for over 200 PFAS compounds.
The natural rubber gasket contains no fluoropolymers — PFAS simply isn't present in this material. Combined with the glass lid and stainless steel clamps, every sealing component is chemical-free.
Oven-safe to 450°F — take leftovers straight from the fridge to a hot oven without transferring to another dish.
Oven-safe to 400°F — you can store leftovers in the fridge and reheat directly in the oven without transferring to another dish. Also suitable for canning and baking.
The press-fit glass lid sits on top without locking clips or gaskets. Caraway's own FAQ notes these lids are not airtight or leakproof — fine for fridge storage, not for transport.
The three-part clamping system — glass lid, rubber gasket, stainless steel clips — creates a canning-grade airtight seal. Expert testing found this style provides the best leak resistance for transport and long-term storage.
The glass containers go in the dishwasher, but the glass lids must be hand-washed — a daily inconvenience most families will notice.
The glass jars go in the dishwasher, but the rubber gaskets and stainless steel clamps need hand-washing. You'll need to separate the components for cleaning — more steps than a one-piece snap-lid container.
Simple press-fit design lifts on and off easily with one hand — no latches to fumble with when your hands are full.
Opening requires removing two stainless steel clamps, then lifting off the glass lid and gasket — definitely a two-handed operation. Not ideal for quick grabs from the fridge, but the trade-off is that canning-grade seal quality.
Containers stack neatly in the fridge, and the included canvas organizer keeps them tidy in your cabinet.
The tall cylindrical shape stacks beautifully — line up four matching jars in the fridge and they create a neat, space-efficient column. Same-size jars nest perfectly.
Everything you need to make the call - who each one is for, and who should skip it.
Go for it if you...
You prioritize the safest possible food-contact materials for your family's daily food storage
You store leftovers primarily in the refrigerator and don't need leak-proof transport
You want oven-safe containers that go directly from fridge to a 450°F oven
You value a canvas organizer system for keeping your cabinet tidy
Safety is your top priority - this product scores highest on material safety.
You want the best value for money in this category.
Performance is what matters most to you.
You want the lowest price option at $40.
The main thing to know
The lids are not airtight or leakproof — Caraway's own FAQ confirms this. If you regularly transport soups, stews, or packed lunches, these will leak.
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.
Skip this if you...
You need airtight, leakproof containers for transporting lunches or soups
You want fully dishwasher-safe lids — Caraway glass lids require hand-washing
You're on a budget — at $29 per container, this is among the most expensive in the category
You need quick one-handed access for busy meal prep — the two-clamp lid system requires both hands and more steps than snap-on alternatives.
You want fully dishwasher-safe containers — the glass jars go in, but the rubber gaskets and stainless steel clamps must be hand-washed.
You have very young children who handle food containers independently — the exterior glaze contains lead at levels that trigger a Prop 65 warning.
Neither of these quite what you're looking for?
I've reviewed all Food Storage Containers options at every price pointEvery Food Storage Containers in our database is scored using R3's deterministic scoring system - the same inputs always produce the same score. For this comparison, we evaluated Caraway and Weck across 3 independent criteria: Safety (94%), Efficacy (6%), Usability (1%). No sponsored rankings. No paid placements.
Straight answers - no sponsored content, no filler.
Both scored close to 9.4/10, so the better choice depends on your priorities. Safety is our top-weighted scoring pillar, followed by efficacy, and usability. Check which pillar matters most to your family and compare those specific scores.
R3 uses a deterministic scoring system - the same inputs always produce the same score. We evaluate each Food Storage Containers across Safety, Efficacy, Usability using independently verified data. No sponsored rankings. No paid placements. Every score is fully reproducible.
Not necessarily. The overall score reflects our weighted rubric, but your priorities may differ. If you care most about safety, compare the safety scores directly. If budget drives your decision, the prices tell a clearer story. The "right" pick is the one that matches what matters most to your family.
Not the right match? Explore these alternatives in the same category.
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Snapware
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Ziploc
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