Needing help from you

I've have purchased some diapers from online store, and i chose the option to pickup them from mail.

I can pickup the box from the mail (no problems) but then i would have to open the box somewhere and put the diapers to my backpack cause the box would not fit in my backpack (duh)

So, tell me what would you do in this situation and where you would open the box if you would have to do it in a city.

The box is 38,50 x 39,00 x 28,00 cm.

Thank you for your answers

Black plastic trash bags are great ways of concealling larger things.

If the box won't fit, you'll have an even harder time getting the individual diapers to fit too. This is because the box, and bag they come in, have the individual diapers compressed together to fit in a smaller box/bag. Once you take thrm out they will expand, thereby making it harder to repack them.

Can you go to some area close by that is more secluded to make the transfer?

At the age of 72 who are you hiding it from? if its your patents I'd have expected them to be very understanding at this point!