Carribean Sea is a very bright ice blue colour, and Glisten Up is a very light blue with silver glitters and green flakes.
It's pretty hard to get the flakes on cam and still get the right colour of the polish.
I really like this combination. I've seen Glisten Up on darker polishes aswell, which also gives an amazing result, but I wanted to try something different.
I really hope Essence will make more polishes with flakes.