Ebay offers Open-box Kitsch Shower Filter for $11.89 (reg $40) with free shipping.

Product Description:
Purify your shower water for healthier hair and skin with the Kitsch Purifying Shower Filter in Chrome! The easy-installation filter helps remove chlorine and certain contaminants from your shower water, promoting gentler treatment on your hair and skin. No matter your shower head type, just twist the filter into place and indulge in your upgraded washtime ritual.

• Dimensions (Overall): 5.12 Inches (H) x 3.86 Inches (W) x 3.86 Inches (D)
• Weight: 13.86 Ounces
• Filters: Chlorine
• Maximum Filter Life: 3 Months