Adam Clarke on Leviticus 11:33

And every earthen vessel - Such pitchers as are commonly used for drinking out of, and for holding liquids. M. De la Roque observes that hair-sacks, trunks, and baskets, covered with skin, are used among the travelling Arabs to carry their household utensils in, which are kettles or pots, great wooden bowls, hand-mills, and pitchers. It is very likely that these are nearly the same with those used by the Israelites in their journeyings in the wilderness, for the customs of these people do not change.