Not too long ago it used to be the case that you could walk into any drugstore and pick a mercury thermometer off the rack for a couple of bucks. Many of these wound up being broken up on purpose by kids to play with the fun little metal balls that scurried to and fro. Times have changed and mercury has become synonymous with poison so a safety conscious world has seen to it that those thermometers share the same historical fate as shoe fitting X-ray scopes and cocaine tonics. But this reputation is in large part undeserved. True, mercury organometallics remain among the most feared of toxins and it's caused terrible environmental damage. Uncombined in its elemental state mercury is fairly inert which means it doesn't do much of anything.
You have the option here of taking a gram in an ampule as shown, recommended where children may have access to your collection, or loose metal drops in container for more savings.