I made a simmiliar one from a 5 gallon bucket, But used a "Portable Loo" 5 gallon bucket cover toilet seat from REI, kitchen trash bags, TP, hand sanitizer, trowel and dust mask, and lime to control the stench. Just be sure to use a dust mask when working with the lime. The stuff is very alkaline, very fine, and chest X-rays are expensive (This year's dumb*** moment).
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Hope for the best and prepare for the worst.

The object in life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane