British start-up Groundtruth has used 120 plastic bottles to create one of its RIKR backpacks, which is designed to survive in harsh conditions like saltwater, blizzards and penguin poo.
The all-black bag holds 24 litres and is designed to endure extreme weather conditions thanks to a novel, high-performance fabric called GT-RK-001 that is made from recycled PET, rendering its shell lightweight and durable at the same time.

"Petroleum-based materials are the most common types within the performance market as they are accessible, affordable and durable," explained Georgia Scott.
"The advancement of textiles plays a key part in cleaning up this industry and through our trial and testing, we have proven that products created from recycled materials can perform just as well as virgin materials," she continued. "The cost is higher, both for us as the producers and therefore also for the customer but the more other companies follow suit, the less expensive these recycled materials will be."
The laptop bags come in three different sizes
Earlier this year, American accessories brand Rothy's released a series of bags made of recycled plastic sourced from beaches and waterways, rather than using plastic that is already within the recycling chain.
The material has also proven popular in footwear design, with Everlane using it to form the laces of its carbon-neutral Tread trainers while Belgian brand Norm spun it into a yarn and used it to 3D knit the upp...