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Heres one for ya , a discarded can which we all know are everywhere these days:
reflector for signal and fire, cooking vessel, candle lantern, water cup, fishing lure, makeshift blade, etc

Most any item has multiple uses governed only by ones imagination and needs

lashing
tent/tarp tiedown
make a net
clothes line
make cord for bow n drill
shelter construction
snares

although for years duct tape ruled and aint knockin it a bit, however there's a new kid in town his name is gorilla tape and my fellow outdoorsmen there is not much of a comparison gorilla tape is...