Can you figure it out??... Rubber round belts/ tubes

Free - what can your smart brain do with these ?? Round rubber tubes or belts ... many 100s of 'em for a great idea !? 36" in circumference from 12" round food-grade lids (for pails) 3/8" wide hollow in the middle and strong I really don't wish to throw these away - and they won't take 'em in recycling, ARGGH! -> they seem like they could be useful for a very cool idea/project... think like Tesla? since we got no brainiacs around here, we only came up with one idiotic idea... hulla hoops for small aliens {but the two we know only took one each...; } Pick up is in the Glenora Store area (Cowichan Valley / Vancouver Island)