Question about Surig Vinegar essence

The bottle of Surig vinegar essence is not made of glass, but of PET. This is not explicitly mentioned in the product information, but there are indications that Surig products are often packaged in PET bottles.

The bottle is a plastic bottle. Vinegar essence in a jar is available in Germany at DM, for example, which would be the brand "Kühne" vinegar essence. LG Sissy