Hana ʻia nā mīkina lima i hoʻohana ʻia me nā mea HDPE hou, hiki ke maʻalahi a paʻa, a ʻo ka ʻili he concave a convex i hana ʻia e pale i ka skid.Hiki ke pale i ka aila, ʻaʻohe mea ʻawaʻawa, ʻono ʻole, ʻaʻohe pōʻino hiki ke pale i ka hoʻopili ʻana, hiki ke hoʻopaʻa ʻia i ka leakproof, hiki ke hoʻomaha i ka hoʻohana, lōʻihi, hiki ke hoʻohana ʻia me nā lima ʻelua