I use plastic pots with lids for freezer storage (yes, I know it’s not permie, but these have been in use now for nearly 20 years and still going strong, so no apologies!). They are like the Rubbermaid previously mentioned, but by Lakeland, a UK company. They come in handy portion sizes and I can write the contents on the lid with a Sharpie pen, and they stack easily so keep the freezer tidy.
When they do finally give up, not sure what I will do - not keen on using glass, too bulky, and danger of breaking. I never/rarely use plastic food wrap or plastic bags. The trouble is freezing is so convenient and easy, I couldn’t cope with canning or bottling any more than I already do and anyway not keen on the texture of some canned veg and fruit. May be I will have to experiment with metal or glass…