What are numbers on plastic bottles?

Question

what do they mean?

Answer 1

some mean the date that they were made then when it should be consumed by but you're not being really specific so it could mean ANYTHING haha

Answer 2

Since you specifically said PLASTIC bottles I'm going to take a guess that you are talking about the recycling numbers on the bottom - a single digit 1-7 inside of the recycling arrow triangle. If that's the case, here's what they mean:

1 - Poly(ethylene terephthalate):  Soda bottles, water bottles, vinegar bottles, medicine containers, backing for photography film.

2 - High-density Polyethylene:  Containers for:  laundry/dish detergent, fabric softeners, bleach, milk, shampoo, conditioner, motor oil. Newer bullet proof vests, various toys.

3 - Poly(vinyl cloride):  Pipes, shower curtains, meat wraps, cooking oil bottles, baby bottle nipples, shrink wrap, clear medical tubing, vinyl dashboards and seat covers, coffee containers.

4 - Low-density Polyethylene:  Wrapping films, grocery bags, sandwich bags.

5 - Polypropylene:  Tupperware®, syrup bottles, yogurt tubs, diapers, outdoor carpet.

6 - Polystyrene:  Coffee cups, disposable cutlery and cups (clear and colored), bakery shells, meat trays, "cheap" hubcaps, packing peanuts, styrofoam insulation.

7 - The hotdog of plastics!  Products labeled as "other" are made of any combination of 1-6 or another, less commonly used plastic.