Folder. I fold it "long" then get a second fold out of it
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Although...since the macerator pump on my motorhome's septic system really isn't supposed to take TP, I've switched to high-grade kitchen "Bounty" type rolls. One sheet folded twice makes a nice square. Then stuff it in a ziplock freezer baggie and when it's getting full, time to throw it out
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There's this special "RV compatible" TP that's supposed to totally shred itself at the first hint of water but it's both expensive and diiiisgusting. Good ol' Bounty is WAY better
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