One of the best purchases I have made. Incredibly convenient. I also got stakes, but this is far superior because it takes up minimal space, weighs nothing, and you can use it just as well on any ground. You simply fill them with whatever the beach has, sand, pebbles, stones, anything, tie the umbrella to it, and nothing moves it. The size is excellent because if you fill them, they become heavy enough that even very strong wind cannot move them. Then you simply empty them, take them, and go, and they even fit in your pocket. I highly recommend them!