There are lots of information about hospital bag on the web and I would like to add my experience on this one too.
Clothes
2 nightgown (pajamas were not useful to me)
1 slipper
1 robe
1 breastfeeding bra
2 pair of socks
4 pants
You can also get home-going outfits
The breast cream
Breast ped
Hygienic pad (also stock for home)
Hand cleaning gel )
Bath towel
2 hand-towel towels
Comb
Bag for dirt
Baby
1 pack of baby diapers
3 snappy babes
3 trousers
3 mouth wipes
Cotton yada pure water wet newborn wipes 1 pack
Car seat
For the father
2 spare t-shirts
Phone charger
Coins (if there are coffee machines) 😄
Documents
ID Cards