Potomac Banks 2.5g Pearl Shaped Water Gel Decor Flower Balls Red (Pack of 2) Comes with Free How to Live Stress Free Ebook This 2 pack of 2.5 grams of Water Gel balls swell to be fill 3/4 of a cup (177.44 milliliters); Comes with Free How to Live Stress Free Ebook Water beads are great for crafts, events, centerpieces, and even as a soil substitute They grow to nearly 10 times their original size when fully hydrated, and are easily reusable Our beads reach fullsaturation within a few hours, and, depending upon ambient conditions,last weeks without re-watering They are beautiful, easy to use,a blastto play with, and fun for the inner child in us all