Nō te whakamahere i ngā rārangi kāreti mo ngā pūoro wai, he mea nui tonu i waenganui i te whakapakoko rongoā me te hiranga purei. Ka kitea ngā kāreti nei i runga i te maha o ngā mahi whakamahi, ā, ka tae atu ki ngā hiranga purei. He aha rawa ngā kāreti e whai ake ana i te whakamārama i te mea, ko te hanga i ngā rauemi matatika me ngā momo tuhituhi matua hei whakatūpato i te whanaketanga me te pai akiaki. Ko ngā kāreti hou i hangaia hei whakarite i ngā momo wai, he whiuwaka ki te wai, ā, ka taea e rātau te whakamana i te whakaū ahakoa i roto i ngā wāhi maroke, māmara, pērā i ngā whatakai matawhero rānei. Ka whakamahi ngā kāreti i ngā momo huringa matua e kore e pūtake, e kore e whakarerekē i te wāhanga i te wai rānei, i ngā whakarerekē o te werawera. Ka hangaia rātau i runga i ngā inka matua e kore e matakere, e kore e kaihua, hei whakatūpato i te kawe i te kīwaha o te pakeke mō te wā e whai ake ana i te hiranga o te rongoā. Ka taea e ngā kāreti nei te whakarite i ngā āhua pūoro ā-ipuritahi, mai i ngā pūoro wai tino tautoko ki ngā pūoro rongoā taipitopito, me te take i a rātau i ngā rauemi matatika e āhei ana ki te whakarerekē. Ā, ka whai hoki rātau i ngā huinga tirotiro haumaru, pērā i ngā āhuatanga e āhei ana ki te whakaatu i te kawe i te whakarerekē, me ngā tohu whakamārama hei whakauru i te mana o te pakeke me te haumaru o te kaiwhakamahi. Nō reira, kei roto i ēnei kāreti hou anō ngā āhuatanga kaweao, pērā i ngā tohu QR rānei, me ngā tohu NFC (Near-Field Communication), hei whakangungu i te hononga matatini ki ngā kaiwhakamahi. Ka whakaae ngā kāreti nei ki ngā tikanga FDA mō ngā rauemi e taea ana te whakapā ki te kai, ā, ka tuku hoki i ngā whiringa mō te whakaputa i te hiranga pakeke mā te whakapākiri, te whakapapa UV spot rānei, me ngā tahuhu karuke.