https://www.npiweb.com/sansone
Plastics are classified by their “resin identification code” – a number from one to seven that represents a different type of resin. To find it, flip the container over and the number will be in the middle of a recycling triangle.
There are several things that you should be aware of when shopping for and using different plastic containers:
• Look for No. 2, No. 4 and No. 5. These transmit no known chemicals into your food.
• No. 1 polyethylene terephthalate is good for single use and accepted by municipal recyclers.
• Avoid No. 3 plastics, these interfere with hormonal development releasing dioxin.
• Hand-wash reusable containers gently; dishwashers can make areas for bacteria to grow.
https://www.npiweb.com/sansone