Recycling Tetra Paks

Does anyone have any ideas for recycling Tetra Paks. I've found a bunch that turn them into something creative, like a pencil holder cup but so far only 2 that could be described as Permaculture based.

Making plant pots: http://www.permaculture.co.uk/readers-solutions/tetra-pack-plant-pots



Used as roof insulation: http://www.appropedia.org/Ceiling_insulation_out_of_recycled_Tetra_pack_at_Pedregal



I would love to discuss and see other ideas, especially if anyone has used them in bio-construction. I would have thought the rectangular shape would apply to bio-construction in the same way plastic bottles are used but can't find any examples. Unless, of course the filled packs can lose their shape and distort under weight or pressure (which filled bottles bottles don't do so easily) making them unsuitable.

The challenge I have with using the Tetra packs as plant pots is that it doesn't feel like a long term recycling solution. I find that after 6 months or so the structure of the tetra plant pot has degraded and can't be reused, so its rather a way of extending its use for 6 months and delaying its eventual journey to the landfill. Not ideal.

I'm really hoping to find longer term recycling uses. So far, I've only found ways that use its thermal properties. I will be using it in the next solar dryer we make and will be preserving them for the next roof of the next bio-construction, but we are accumulating more of these things than we are finding uses for. I sure could do with some group thought on how to find other long term uses.

Peace