You won't be able to dismiss this by usual means (escape or click button), but you can close it programatically based on user choices or actions.
"I wanted a save the date to match my invitations (I am ordering all of the Opulent Crest line). I didn't want to spend a fortune on a magnet and these were a great price. The quality was awesome and they were better than I expected. The envelopes were thick and didn't show the dark blue through. I can't wait to order the invites!!"