Recently, I heard that storing water containers on concrete floors can cause chemicals to leech into your water. I have several Aqua-Tainers that I have stored in my garage for the past few years. I clean and fill them 2-3 times per year. I have never tasted anything odd when I do a taste test. A few weeks ago I got a few pallets to store the containers on just in case. Have you all heard the same thing? What has been your experience?