Using good strong rope, threaded through the square of holes, firmly tie a full sized concrete block across the bottom of the bucket. Fixing an eye bolt to the remaining hole and using large washers on both sides of the plastic to prevent its being pulled out, you are ready go get your shovel.

Dig a hole in the ground deep enough and large enough to hold them both so that only 3cm of plastic shows above ground level. Fill around the bucket and tamp.

Thread a length of light chain dog leash through the eye bolt and leave both ends lying out on the ground.

Go get your tightly bound submissive who’s been waiting over under the beach hanger, tethered to an overhead branch.

There are several ways to make this work. The simplest is to snap the chain to the dog collar around the subbie’s neck and haul away, pulling her head down into the bucket. A nose or tongue ring could also be used to good effect here. You could even use a ring fixed to the front of her gag.

Once her head is in the bucket, she can be put to many good uses. If there comes a time when you want to stop her kicking, a second concrete block can be lashed between her feet. This also offers a neat place to sit, if you fancy some bearded oyster ala fresco.

Re-tying her wrists through the holes in the second block works nicely as well. Gives her shoulders a break.

You will want to cover the bucket when it rains or it will fill up with stagnant water, taking some of the fun out of it for the subbie.

Another fun trick is to cut a lid across its diameter then cut two throat-sized semicircles into the halves. This also works as a portable prison if the bucket is free of the concrete block.

Be very very careful. Nobody needs a broken subbie.