Our specially formulated flower drying crystals are great for preserving flowers, herbs, bouquets, corsages, boutonnieres, wreaths, seeds and much more. Our flower drying crystals come in a reclosable bag and perfect for beginners to use as one bag can dry 100"s of flowers. Preserving fresh flowers is a simple and fun family project that lets you enjoy the beauty of flowers all year long. Our flower drying crystals do not contain cobalt chloride ii indicating silica gel that is blue in color and has possibly been linked as carcinogenic to humans and been labeled as hazardous material in some countries and is currently sold by other brands in the usa. Our indicating flower drying crystals are reformulated to remove cobalt chloride ii which provides our customers with a safer indicating flower drying crystals for our customers. Our indicating beads will turn from orange to dark green when the silica gel is about 60-percent absorbed with moisture.