packet in English:

a packet of crisps

My son eats two packets of crisps a day. I don’t think it’s healthy to do that.

I've just opened a packet of cheese slices.

A packet of cigarettes, please

Two packets of biscuits, please.

Finally! The postman bring me packet.

I send you the packet.

She put a packet of peanuts in his packed lunch.

This book is the literary equivalent of Haribo sweets: you only want to eat one, but end up devouring the whole packet.