You can vary them by the jars used,
float some glass jar filler or other fruits, small vegetables and even add food coloring to the water.
He used
glass, seashells, costume jewelry, broken plates, ceramic tiles, marbles, fishing net
floats,
jars, ink bottles, you name it, to embellish his creations.
Suspended in clear liquid in a
glass jar on the fourth floor of a musty museum in St. Petersburg
floats the second strangest thing I have ever seen...