Yes, the zero-waste boxes are quite amazing. And expensive!! You're correct, Su, a large part of what is offered in those zero-waste boxes can be done for free, or composted, etc. One example was the human hair box...which was an eyebrow raiser for me.
The free programs (their "brigades"), however, especially for items for which we
don't have recycling available, now those are interesting to me! So currently, I'm thinking these three free programs look appealing:
snack or chip bags - https://www.terracycle.com/en-US/brigades/haincelestial vitamin/supplement bottles via: https://www.terracycle.com/en-US/brigades/rb-health (Paul and I generate a lot of empty supplement/vitamin bottles! too many to use for seed sor other things!)electronics: https://www.terracycle.com/en-US/brigades/electronics-recycling (we currently have some cell phones to dispose of...)
There is a fourth free one for Cliff bars and other
energy bar wrappers, though we don't have so many of those here. Though some times some of our helpers have these.