nostr:npub19sdzmtpggrjt7mm0egnx4ck0694hsc3cqx4jgyuav4mcqcl9ztjs63u6lg for bottles from friends and family. 2L bottles give the best yield and generally have consistent thickness so that is what I ask for.

You are correct that those non-carbonated water bottles don't work well. The wall thickness is far too thin to make a filament. You would have to start with a strip so wide as not to make the effort worthwhile.