I also like to go with watery vegetables so that I can maximize the volume of juice that I'm getting. (simplyquinoa.com)
If you use a chewy or watery vegetable such as onions or zucchini, be sure to precook, drain well. (ellenskitchen.com)
Soluble fiber sources that are found in berries and certain watery vegetables like cucumbers, dissolve into a gel like substance when digested. (detoxdiy.com)