The wet shiny contents would be nectar.
Many times I will inspect a beehive and see cells packed with orange and yellow pollen. Today I had the pleasure of witnessing a wider color range that included yellow, blue, white, and pink.
Here is a look at a forager bee with pale yellow pollen on its legs (pollen basket):
And here is a bee bringing blue pollen to the hive:
This bee unfortunately has a varroa mite on its back.
To learn more about colors of pollen, take a click on this link.