All you need to know from the RIRRC.
Is it a plastic container? Is it 2 gallons or smaller? If so, recycle it.
What about those numbers?
Disregard the little triangle and numbers completely and instead recycle all plastic containers up to 2 gallons.
This includes but is not limited to: mayo, peanut butter, and jelly jars; butter, ice cream, and margarine tubs; plastic take-out containers; soda, shampoo, and water bottles; iced coffee cups; yogurt containers.