I am normally not bias to any one company. I try to remain neutral in favor of all options. But this time, I actually do have a favorite in the rain tank sphere and that is the Bushman rainwater harvesting systems. What I like most about this companies product is variety. You have many options in terms of color and size. There are a total of 3 colors and 8 different sizes. This means that in any garden you have options on what size to pick depending on what fits best in the space you want to put it in.
This video is of a garden in Tustin, where we used several Bushman rain tanks.