I love that you feel them with water so if you have to move them just empty out the water until you can move them easier, the way they interlock locks them in place, I love the color  the texture of the base are attractive and match my outside Furnature, thank you for have such a quality product, and I forgot to mention that if your going to the Beach, these work great half filled with water just set up and enjoy the shade I am sure that you’ll find different set up Ideas for yours.