Rosendahl Opus Storage Jar, 0,5 L Rosendahl Opus Storage Jar, 0,5 L. Ideal airtight storage jar designed by Ole Palsby for Rosendahl in Denmark. These storage jars are a natural place for all the things we all keep in our kitchens for use in day-to-day food preparation. Characteristic glass stoppers with their arched handles provide an airtight seal, locking in the tastes and flavors. Dishwasher-safe.