ʻO ka hōʻailona ʻana i loko o ka mold (IML) kahi kaʻina hana i ka hana ʻana i ka paʻi plastik a me ka hōʻailona ʻana, hana ʻia ka ʻeke plastik i ka manawa like i ka wā hana.Hoʻohana mau ʻia ʻo IML me ka hoʻoheheʻe ʻana e hana i nā ipu wai.