EllanVannin I can answer that and any other moan about how hard it is to get into a product these days.
It's to prevent theft.
My friend Ellen designs packaging and I asked her some time ago why it's so hard, especially for arthritic fingers.
She told me "People go into supermarkets, open cheese cakes, poke a finger in and taste it and if they don't like it, shove it back in the freezer. They drink copiously out of fruit juice and milk bottles, take paracetamol and toothpaste out of packets, and chops out of theirs.
All to either taste, or steal by just dumping food, without its security barcode, into a plain bag."
So if you can't get into your biscuits or soap powder without fighting the packaging, thank the thieves.