Hair-wash tray: What tool will make it easier for me to wash my client's hair?

You may be interested in knowing about hair-wash trays and shampoo funnels, which are products designed to make it easier and more comfortable to wash hair in the sink. Below are direct links to some examples of such products: 

• Hair Washing Tray by BIOS Medical (at agecomfort.com) reduces the need for those with limited mobility to awkwardly and uncomfortably bend their heads. This tray, which can be used with a chair or wheelchair, comes with raised edges to prevent water from splashing over the side. This product costs about $20 to $30 (CDN), plus an additional shipping fee.
• Hair Shampoo and Rinse Tray by Jobar (at Amazon Canada) is good for those with limited mobility and can be used with a chair or wheelchair. This product costs about $75 to $85 (CDN), plus a shipping fee.
• Comfort Hair Wash Tray by Parsons ADL (at Seniors Store) mounts on the shoulders and is held in place by a strap, which is hung onto by the user (by wrapping it around their arm). This product can be used in any home sink, bathroom or kitchen, and costs about $100 to $120 (CDN), plus a shipping fee.
• Betty Dain Hair Washing Shampoo Funnel (at Amazon Canada) is a plastic hair washing device that is designed to fit on a person's head so that their hair can be easily washed in an upright position. This product, which is ideal for people who may have physical challenges that prevent them from using a traditional shampoo bowl, costs about $30 (CDN).