Compare Food Storage Containers
Glasslock 18-Piece Assorted Oven Safe Container Set scores higher on safety - here's why.
The most important dimensions, side by side.
Tempered soda-lime glass is chemically inert and FDA-approved — no chemicals leach into your food. Slightly more susceptible to thermal shock than borosilicate but perfectly safe for daily use.
Borosilicate glass is the gold standard for food-contact safety — chemically inert, handles freezer-to-oven transitions without shattering, and zero chemical migration.
Food-grade polypropylene lids are FDA-approved and BPA-free by nature — a solid choice, though not as inert as silicone or glass lid materials.
OXO does not disclose the specific plastic type used in the lid. While it includes a silicone gasket and is BPA-free, the lack of material transparency is a concern since the lid contacts your food directly.
Confirmed BPA-free across both the glass containers and polypropylene lids.
Confirmed BPA-free for both the borosilicate glass container and plastic lid components.
Glasslock has not published PFAS-free testing for the lid silicone gaskets — a transparency gap but not unusual in 2026.
OXO has not published PFAS-free testing for the silicone gasket or lid — common across most brands in this category.
Oven-safe to 450°F via TEMPERMAX tempering technology — full versatility from fridge to oven.
Borosilicate glass goes from freezer to preheated oven without needing to thaw first — full versatility for reheating, baking, and roasting.
The 4-tab locking clip system with integrated silicone gasket is the most leak-resistant design tested by expert reviewers — ideal for transporting soups and liquids.
Four locking tabs with a silicone gasket create a fully leakproof, airtight seal — safe for soups, sauces, and anything you need to transport.
Both glass containers and polypropylene lids are fully dishwasher safe — no hand-wash components.
Both glass container and lid are fully dishwasher safe.
The 4-tab locking design is very secure but requires snapping all four sides with two hands — slower than press-fit or one-handed snap designs.
Four locking tabs require two hands to open and close — slightly frustrating for quick refrigerator access but the trade-off for a leakproof seal.
Containers stack with lids on and nest with lids off — though the mixed shapes (round, square, rectangle) are less space-efficient than uniform sets.
Stacks neatly in the fridge or freezer and nests in the cabinet when stored without lids.
Everything you need to make the call - who each one is for, and who should skip it.
Go for it if you...
You want glass containers with genuinely leakproof lids for transporting lunches and soups
You need an affordable 9-container glass set under $40 for meal prep
You regularly move containers from fridge to oven — these handle 450°F
You prefer everything to go in the dishwasher without exception
You need a leakproof container for transporting soups, sauces, or packed lunches
You want borosilicate glass that can go from freezer to oven without thawing
You prioritize seal performance and are comfortable with OXO's BPA-free claim without specific polymer disclosure
You want a container that stacks neatly in the fridge and nests in the cabinet
The main thing to know
The polypropylene lids are the weakest link — Glasslock has not disclosed PFAS-free status for the lid gasket material, and the specific plastic formulation beyond "BPA-free" is not detailed.
OXO does not disclose the specific plastic type used in the lid. While it is BPA-free with a silicone gasket, buyers who want full material transparency should consider alternatives like Glasslock that disclose PP lids.
Skip this if you...
You want to eliminate all plastic from your food storage — the PP lids are direct food-contact surfaces
You need one-handed lid operation — the 4-tab locking system requires two hands
You specifically need PFAS-free verification on lid gaskets
You want full material transparency on lid composition — OXO does not disclose the specific plastic type
You prefer one-handed convenience — the 4-tab locking mechanism requires two hands
You need a budget-friendly set — at $14.99 per single container, a full set adds up quickly
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 Glasslock and OXO across 3 independent criteria: Safety (94%), Efficacy (6%), Usability (1%). No sponsored rankings. No paid placements.
Straight answers - no sponsored content, no filler.
I'd start with Glasslock Glasslock 18-Piece Assorted Oven Safe Container Set - it scored 5.9/10 overall in our scoring system. 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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