How should I store these crispbreads to keep them crisp, and how long do they typically stay fresh after opening?

Because they are baked into a dry, crunchy form, the key to maintaining crispness is protecting them from moisture and air. After opening the original packaging, transfer any unused crispbreads to an airtight container or resealable bag, squeezing out excess air before sealing. Store the container in a cool, dry pantry away from direct sunlight, heat sources, or humidity (like above a stove or near a sink). Properly stored, they should stay crisp for several weeks. If you live in a very humid climate, you can add a food-safe desiccant packet to the container. If they lose crispness, you can briefly toast them in an oven or toaster oven on low heat to restore some crunch, though this may slightly alter the flavor. For long-term storage, they can be frozen in an airtight bag; thaw at room temperature inside the bag to prevent condensation.