We had a 55 gallon drum cut lengthways if I remember right.
But with the hatches being 29 inches in diameter, it was difficult to get up/down the hatch.
And there was a problem with storage when not in use.
So I think it got dropped over the side, and we used whatever was the cheapest we could get.
And yes, I've been on several steel beaches.
Once, I went topside in civilian clothes and told everyone I thought they said LIBERTY CALL.