Zepter vacuum cookware.

Vacuum storage containers from Zepter's VacSy line (marked "vacSy Vacuum System" on the box). They are designed for longer food storage by extracting air with a special pump – this helps maintain freshness and slow down spoilage.
What they are and how they work
Hermetically sealed plastic containers with a vacuum valve in the lid
Air is extracted with the VacSy pump → oxidation is reduced
Often used in the refrigerator, for marinating, or preserving food
Lids have a date scale (visible in the red section)