Drink bottles, mayonnaise jars, peanut butter jars, etc., that have this recycle symbol are made of Polyethylene terephthalate which is believed to be Phthalates free. Polyethylene terephthalate ethylene (PETE) is the main substance used to package bottled water and many sodas. Products containing PETE are labeled “Type 1” for recycling purposes. Although the word “phthalate” appears in the name, PETE does not use phthalates as plasticizers. The terephthalate polymer PETE and the phthalate ester plasticizers are chemically different substances.
So…you would be safe to use one of these bottles or jars with a tight fitting lid and an oxygen absorber to store your food in long term. As with all food storage, light and temperature affect the shelf life so keep them in a cool, dark place. You may even find that the size and shape of these containers resolve some storage space problems.