Food Storage Containers · Head-to-head
PlanetGoods by PlanetBox Square Glass Food Storage 6-Piece Set (3 containers) vs Weck 742 Mold Jar 1/2 L, Set of 6
Best Easy-Open Leakproof Lids
PlanetGoods by PlanetBox Square Glass Food Storage 6-Piece Set (3 containers)
7.8/10
The short answer
PlanetGoods by PlanetBox Square Glass Food Storage 6-Piece Set (3 containers) comes out ahead overall with 7.8/10 against 6.9/10 for the Weck 742 Mold Jar 1/2 L, Set of 6. PlanetGoods by PlanetBox Square Glass Food Storage 6-Piece Set (3 containers) is stronger on seal & leakproofing, health & materials, stain & odor resistance and ease of use. Weck 742 Mold Jar 1/2 L, Set of 6 is stronger on value.
- Choose the PlanetGoods by PlanetBox Square Glass Food Storage 6-Piece Set (3 containers) if: Buyers who struggle with stiff suction lids and want square, stackable all-glass containers (sold on planetbox.com, not Amazon).
- Choose the Weck 742 Mold Jar 1/2 L, Set of 6 if: Buyers storing soups, yogurt, grains and fridge staples who want cheap, thick glass jars with replaceable parts.
Scores by criterion
| Criterion | PlanetGoods by PlanetBox Square Glass Food Storage 6-Piece Set (3 containers) | Weck 742 Mold Jar 1/2 L, Set of 6 |
|---|---|---|
| Seal & Leakproofing | 8.0Reviewed called the lids truly leakproof, but published no numbers, and it tested the 12-piece configuration. | 6.5The clamped rubber ring can seal well, but there's no storage leak test and TechGearLab called it finicky. |
| Health & Materials | 9.0Borosilicate glass and glass lids with an LFGB-certified silicone rim; no PFAS claim. | 7.5Glass, rubber and steel; the glass type is unstated and Weck recommends plastic covers for freezing. |
| Durability & Heat Safety | 7.0Borosilicate glass, but no oven rating and a 1-year warranty. | 7.0Thickest glass and first for longevity at TechGearLab, but the lids can break and there's no oven rating. |
| Stain & Odor Resistance | 8.0Glass on both sides with a single silicone rim. | 7.0Glass doesn't stain; the rubber rings may hold odors but can be replaced. |
| Ease of Use | 7.5Easier to open than Pyrex (Reviewed), and the squares stack; the glass is heavy. | 5.5Clamps and loose rings are fiddly and there's only one size. |
| Value | 7.0About $11.66 per container for 2.5 to 8 cups. | 8.0About $6 per jar, or about $4 at TechGearLab's $24 list price. |
Specifications
| Spec | PlanetGoods by PlanetBox Square Glass Food Storage 6-Piece Set (3 containers) | Weck 742 Mold Jar 1/2 L, Set of 6 |
|---|---|---|
| Lid material | Clear glass with silicone seal | Glass |
| Plastic-free lid (no plastic in lid/seal) | Yes | Yes |
| Container glass type | Borosilicate | — |
| Seal / gasket material | LFGB-certified silicone | Rubber ring with metal clamps |
| Manufacturer states PFAS-free | No | No |
| Number of containers | 3 containers | 6 containers |
| Container capacity range | 20-64 fl oz (about 2.5-8 cups) | 19.6 fl oz each |
| Lid microwave-safe | Yes | Yes |
| Lid dishwasher-safe | Yes | Yes |
| Warranty | 1 years | — |
PlanetGoods by PlanetBox Square Glass Food Storage 6-Piece Set (3 containers)
Pros
- Fully plastic-free: glass bowls, glass lids, silicone rim
- Lids easier to open than Pyrex's
- Stackable square shape
- Three useful sizes
- Microwave- and dishwasher-safe lids
Cons
- Sold mainly through the maker's site
- No oven rating
- Only a 1-year warranty
- Heavy, like all glass
A good alternative to Bentgo for people who dislike stiff lids. The evidence is a single strong review, so it ranks just behind our top pick.
Full PlanetGoods by PlanetBox Square Glass Food Storage 6-Piece Set (3 containers) review →Weck 742 Mold Jar 1/2 L, Set of 6
Pros
- Thick glass, ranked first for longevity
- No plastic in the closure
- Replaceable rings and clamps
- Low cost per jar
- Good for soups, yogurt and grains
Cons
- Clips are easy to lose
- Glass lids can break
- Replacement parts harder to find
- Freezing is recommended only with Weck's plastic covers
- Weck doesn't state the glass type
A cheap, durable choice for fridge staples at home. Treat it as a jar, not a lunch box.
Full Weck 742 Mold Jar 1/2 L, Set of 6 review →Both products are part of our guide The Best Glass (Plastic-Free) Food Storage Containers of 2026, where you can see every pick, how we score and current prices from each retailer.