This is "elastic water," a substance researchers have created in Japan that's 95% water yet retains a jelly-like texture that's perfect for sticking tissues together.
The stuff is made by adding two grams of clay and "a small quantity of some organic matter" to regular old water. And if they're able to figure out how to increase its density, it could produce eco-friendly plastic materials. Also, I bet it feels real weird when you squeeze it. [Japan Science and Technology Agency via Akihabara News]