If you decide to purchase a daily deal for a friend, you may only purchase this deal once as it will appear as sold out. So you can not purchase the same daily deals for yourself and a friend.
However, you can purchase as many general packs (e.g honeydew 275 flutterbucks, or Event packs) as you want for your friends! Some of these packs will require an in-app purchase using your debit or credit card. You can also send your pal a Bumblebee!
You cannot send a friend a Doug The Glowbug.