I've been looking for these too. Is there a special/technical requirement you are aiming for?
Any big plastic bag can changed from a container into cover or cordage.
A safety orange bag could also be used for signaling.
I was thinking (smaller) rubble bags? Or going large with the cheap plastic Bivy bags. If I'm collecting leaves from a primary forest; I might aim for a 'Bigger baggy' / Ground sheet / Bivvy.
Door number 1.
A highly visible, heavy duty, full sized poly bag printed with survival information
www.bcbin.com
£6... an attempt was made.
Size: 720 x 915 x 1830mm.
Weight: 198g (12.1oz).
Thickness: 70mu (2.76 Mil, 0.07mm, 276 Gauge).
Door number 2. These are available in Orange and Green.
Buy a Emergency Survival Bag at Highlander Outdoor Online. Enjoy Free Returns, Excellent Customer Service and Free Delivery From £20. Shop Now
highlanderforces.com
£5 + Postage from £4.
Size: 90cm x 180cm.
Weight: 260g.
Door number 3.
100% Waterproof Hi Vis Bivvi bag from Trekrite - For climbers & hikers to use in survival situations or for emergency shelter during bad weather.
www.trekrite.co.uk
£4.59 + Free shipping (Royal Mail 48).
Size: 180 x 90cm approx open, 23 x 17 x 1 cm folded.
Weight: 220g approx.
The extractor bags look amazing. (I'm looking at the 600 mm ones).
£32.34 (500mm) / £35.94 (600mm) + £10 postage.
Size: 81cm / 96 cm x 134 cm, (pack of 25).
Thickness: "500 gauge equivalent" => 5 mil, 127uM or 0.127mm.