Maybe the die cut for zippers has been around for some time but I just recently discovered it and thought, "what fun!" I hope recipients get a kick out of pulling the strip open to see the text that is revealed.
I've been playing with different designs (there's both a vertical and horizontal version of the die) and this was my first one. The dots are all washi tape. I covered cardstock with the black dots and then punched out the flowers. The smaller flowers are punched. I black embossed the hello over the tape. The card is flat and doesn't open as a standard card does.
The die and coordinating text stamps are available from Papertrey.