Aqua Lift by By Wishes in nude. These are individual fabric cups filled with a firm mix of water and gel that can be either placed or sewn inside your bra. They can also be sewn into dresses, tops and swimwear.
The padding is placed at the bottom of the cup as you can see in the picture of the reverse side. It's not watery but more of a foam consistency so pliable enough to be flexible inside a bra.