I find that this recycling necklace doesn’t look like a recycling necklace ;-)
For the inside I imagine that the 7 strand plarn rope would come in handy.
Links:
Recycling Necklace (Gargantilla tribal en negro y plata, realizado con bolsas de plástico e hilos metalizados.) (Spanish)
English Google translation of the title: ‘Tribal necklace in black and silver, made with plastic bags and metallic threads.’
via: necklace from wool wrapped around plastic bags
Here at unikatissima:
7 Strand Plarn Rope