Water Pearls To create these clear polymer pearls, simply add water and watch as they expand into perfect little spheres. Take your pick of sapphire blue, crystal clear, pastel pink, white, lemon yellow, jet black or peacock green. One 2 oz. package will create approximately 1.5 gallons of hydrated water pearls. For an unforgettable look, add to square glass vases and engraved glass vase centerpieces with flowers or candles.