Numbers

Every type of plastic container has a small symbol on it, usually a triangle with a tiny number inside, which tells recyclers what the product is made from and what it can be used for in its next life. In case you were wondering, here's the list:
1 - Soda bottles which become fill for pillows
2 - Plastic milk bottles and detergent bottles become more detergent bottles
3 - Takeout boxes and hair product bottles transform into drainage pipes
4 - Grocery bags turn into more grocery bags
5 - Yogurt containers are recycled into plastic lumber
6 - Packing peanuts also form into plastic lumber
7 - Plastic ketchup bottles, alas, can not be recycled - Buy glass instead.