Powder. The price stated on the website is for 1kg of silica gel powder.

Silica gel powder is mainly used for drying and preserving flowers and bouquets. Place 2cm of silica gel powder in a container. Put the flowers or bouquet on top of the powder and cover the rest with more powder. Close the container as tight as possible. The process will take 2 or 3 days until they are completely dry. (Source: Rogers, B.R. 1988. The Encyclopaedia of Everlastings. New York Michael Friedman Publishing Group, Inc. 191 pp.)