Algreen 50 Gallon 23.5 In. W x 23.5 In. D x 33 In. H Rain Barrel - A66 81002 by Algreen. $115.47. Algreen rain barrels with planters combine the timeless aesthetic elegance of ceramics with the enduring longevity of modern plants. The rain barrel is made of a roto molded plastic plastic that is able to withstand extreme temperature. The molded plastic rain barrel will not chip, crack, or fade.