Scott, I checked my work bottles this morning. They are a Delta 7. and found this.
•All of the plastic resins that don’t fit into the other categories are placed in the number 7 category. It’s a mix bag of plastics that includes polycarbonate, which contains the toxic bisphenol-A (BPA). These plastics should be avoided due to possibly containing hormone disruptors like BPA, which has been linked to infertility, hyperactivity, reproductive problems, and other health issues.
•Plastic #7 is found in sunglasses, iPod cases, computer cases, nylon, 3- and 5-gallon water bottles, and bullet-proof materials.
•It is recycled into plastic lumber and other custom-made products.
The Bottom Line: Which Recycling Numbers to Avoid, Which are ‘Safest’
In the end, it’s really best to avoid using all plastics if you’re able. But at the very least:
•Avoid recycling symbols 3, 6, and 7. While Number 1 is considered safe, it is also best to avoid this plastic.
•Look for symbols 2, 4, and 5, as these plastics are considered to be safest. These are the plastics to look for in terms of human and animal consumption.