This capsule is being used as a holder for emergency medical info for post accident needs in developing country. I was able to fold up the travelers insurance printed card (1.5 in x 6 in) and place all kinds of emergency ID info on that size of paper. It's small lightweight and does the job perfectly. I put it on the titanium whistle and cord I also got from here and the necklace is all in need to hit the roads with Mr, Murphy and Mayhem always lurking about.