Water crystals can be used in vases as a replacement for water. Just mix 1 ounce of dry crystals to 1 gallon of water. After about 2-4 hours, dump out the excess water and place the appropriate amount of gel into a vase or decorative jar. This makes very nice displays.
You can place the gel into a vase, and add freshly cut flowers to the vase. This is a much nicer way to display your flowers rather than just having water. The crystals will provide water to the flowers as they need it. As the flowers drink the water, the gel will slowly shrink. You can always add more water to the crystals, and they will absorb it once again.