Ko ngā poupou whakapuru he momo poupou haumaru, he poupou whakahaere waka rānei e mau ana ki te whenua mā te whakamahi i ngā pūtu, kaua ki te whakauru ki te raima. He mea whakamahi noa ēnei poupou mō ngā wāhi kāore e taea te tāutanga tuturu, me ngā wāhi rānei e hiahiatia ana te ngāwari o te whakanoho.
