It's clearly the time of year (no pun intended) for innovative postal inventions: last month, we heard about paperless postal service Zumbox; now we hear about the Stopper Postcard, a new design which includes a timer so that its recipient will know exactly how long your vacation missive took to reach its destination.

As Technoglam reports, the card was designed by Tel Aviv-based designer Tal Mor et Shlomi Azulay of DAG-designlab and has a counter on the front that starts counting up once activated.

However, whether it will get through any postal service's security system without being blown up remains to be seen.