Weck Glass Storage / Canning Jars
Glass jar, glass lid, natural rubber gasket, stainless clips - a fully plastic-free sealing system with zero metal-to-food contact, ideal for acidic and fermented foods.
The verdict: Plastic-free
The whole sealing system avoids plastic: a glass jar, a tempered glass lid, a natural rubber gasket between the glass surfaces, and stainless steel clamps holding it shut. Only glass and rubber touch the food - no plastic and, because the seal is glass-on-glass, no metal either.
What it's made of
| Part | Material | Food contact |
|---|---|---|
| jar | Soda-Lime Glass | Yes primary |
| lid tempered glass disc | Tempered Glass | Yes primary |
| sealing ring genuine Weck rings are natural rubber; replaceable | Natural Rubber / Latex | Yes seal |
| clamps stainless steel clips press the lid down; do not touch food; grade unspecified by manufacturer | Stainless Steel grade unspecified | No |
The classic German preserving jar, sold in a range of tapered and barrel shapes and sizes. A tempered-glass disc lid sits over a rubber ring and is held down by two stainless clamps during storage or a water-bath process. Works for canning, ferments, pickles, and jams as well as everyday fridge and pantry storage.
Pros
- No metal-to-food contact - excellent for acidic/fermented foods
- Rings and clips are replaceable; jars are reusable indefinitely
Cons
- Multi-part system (jar, lid, ring, two clips) is fiddlier than a screw lid
- Rubber rings wear and need periodic replacement
- Glass is breakable
Common questions
Does the Weck Glass Storage / Canning Jars have plastic in it?
No. Nothing that touches your food on the Weck Glass Storage / Canning Jars is plastic or silicone — the food path is Soda-Lime glass, tempered glass and natural rubber / latex.
What is the Weck Glass Storage / Canning Jars made of?
Part by part, the Weck Glass Storage / Canning Jars is: jar — Soda-Lime glass; lid — tempered glass; sealing ring — natural rubber / latex; clamps — stainless steel.
Is the Weck Glass Storage / Canning Jars BPA-free?
No plastic touches your food on the Weck Glass Storage / Canning Jars — the food path is Soda-Lime glass, tempered glass and natural rubber / latex — so BPA, which comes from polycarbonate and epoxy plastics, is not in play here.
Where is the Weck Glass Storage / Canning Jars made?
The Weck Glass Storage / Canning Jars is made in Germany.
Categories: Food Storage Containers
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://weckjars.com/faq/ Weck describes the glass lid + rubber ring + stainless clamp sealing system with no metal-to-food contact
- review https://wellwhisk.com/best-glass-jars/ independent confirmation that genuine Weck rings are natural rubber and the system is plastic-free
Spot a mistake or something out of date? Let us know — corrections are how this stays accurate.