I'd never heard of these coin towels before. They do look neat. What happens to them after you've used them though? Can they be taken home, washed, reshrunk (how?) and reused? Or do they just disintegrate? Or... ??
As for wet wipes, I always have some in my tool kit to wipe oil and grease off my hands after dealing with a tyre, chain or whatever. But in practice they've often dried out before I get to use them... And in bulk, yes they're heavy. And really, they're just more litter. Still, they're a good way of wiping babies' bottoms.