Stupidly simple lock with ice

Apologies if this topic has already been covered. But I didn’t spot it during a quick scan, so… Grab two hair bands (the kind used for ponytails). Test them to ensure they are sturdy enough that you can’t easily rip them apart. Usually, they are strong enough! Set them inside an ice-cube mould within the tray and fill with water until two hoops of hair band emerge from the surface while the rest remain submerged. It’s nearly impossible for these two bands to knot themselves together by chance, but poke at them a few times just to be certain. Then pop it in the freezer. Hours later… remove an ice cube from the tray. You now have a block with two loops that can secure whatever you choose. Very simple and practically foolproof; the only minor drawback is getting some melted water around as it thaws. Note: Consider where to apply this method, ideally somewhere you won’t be tempted to use your body heat to loosen it during bondage. Unless you enjoy having cold hands… Want something more durable? Just as straightforward. I opt for longer versions of those flexible plastic-coated metal ties commonly used for various packing needs today (particularly for organizing cables neatly). Any similar item works, provided they don’t knot up easily. I believe cable ties with the tip cut off would work well too since they naturally want to straighten out. So bend one in half loosely into a long U shape. Insert it into a bottle or can so the loop protrudes from the top. Fill the container with as much water as you dare, then freeze. Once enough ice has formed and starts melting, pulling out the bent wire (or plastic) should be quite easy. Again.. simply attach two locks to the upper loop, allowing chains to extend wherever desired while ensuring that when the ice melts, the wire withdraws freely and the locks slide off easily. Be cautious with this one though. Test it first. Once mastered, it’s very simple.