There is nothing better than having some of legendaries in one outstanding lanyard. Here we have characters like Zapdos, Mew, Articuno, Moltres, Kyogre, Rayquaza and Ho Oh, . This is perfect for:

Keys
Badges
Pendrives

Any other tiny important stuff that you have, this can be super useful to avoid losing them completely which can be a huge time saving. If you have any other questions, feel free to ask and I will be more than happy to help you out.