Concept:
Matter is mostly empty space so a solid surface is only an illusion. The atoms themselves are mostly empty space as the particles are very small compared to the size of the atom. The idea is to compress matter by collapsing the empty space between the atoms — very much like how we compress computer files by removing empty spaces and mapping where the spaces should be.

Application:
Compressed Hydro-balls. A sphere the size of a ping-pong ball could contain the same amount of water as an Olympic-size pool. We could use those balls to easily ship large quantity or water to irrigate farms or desert.

Problems:

1. The ping-pong-size Hydro-Ball would weight exactly the same as all the water contained in an Olympic-size pool, which holds 88,287 cubic feet of water. Each cubic foot of water weighs 62.43 pounds. The tiny Hydro-Ball would they weigh 5.5 million pounds or 2.5 million kilos. Imagine shipping a box full of Hydro-Balls…
2. Finding a way to keep matter from re-expending would be amazingly difficult.
3. Developing a release mechanism to expend the content of the ball — water — slowly would be next to impossible. Imagine 88,287 cubic feet of water expending from the size of a ping-pong ball to an Olympic pool in 1 nanosecond. It would be similar to an atomic bomb exploding.
4. Avoiding misuses would be very tricky. Imagine someone who expand a Hydro-Ball in his living room or his car.