1 Easy to Use: Using silica gel drying crystals is simple Just place the flowers or plant material in an airtight container, cover with enough silica gel crystals, and wait for them to dry,2 Reusable: Silica gel drying crystals are reusable After drying the flowers, the silica gel crystals will turn from orange to dark green, which can be heated in a microwave oven or oven, and then turned back to orange and reused This means that you can save time and money by using the same bag of silica gel crystals multiple times,3 Long-term Preservation: Dried flowers and plant materials can be preserved for a long time, making them useful for collecting, preserving, and decorating