2 Pack, Arm & Hammer, Essentials Glass Cleaner Refill, Delivers Extraordinary Streak-Free Cleaning On Windows, Mirrors & Other Glass Surfaces, Fill The Empty 32 OZ Bottle With Water & Twist On The Refill Cartridge Filled With Powerful Plant-Based Cleaners To Easily Create A Powerful Glass Cleaner That Is Effective & Safe, For Use With Starter Kit Mfr #32100.