New Zealand Customs Inquiry

This is my first ever international trip and I have newly purchased five 50mL bottles of perfume with me from a local brand here in PH. They are still in their original packaging (box) but not sealed by a plastic wrap since I have opened them to spray and rest them.

I am just wondering if am I required to declare this with customs or it will be treated as normal? I cant find them under restricted items to bring.

Similarly I would like to confirm if the 2kg weight limit for food products e.g. pancit canton is correct?