Alright here's my acid storing regime:
1.Firstly grabs some fresh dry foil and wrap it (makes nice little square edged shapes which is handy)
2.Put the foil into a ziplock baggie of the correct size and zip it up (a dry baggie of course).
3.Place the baggie into a small tin container that is dry and impermeable to light.
4.Place the tin into a lead-lined case suitable for storing radioactive material (must have an approved radioactive symbol stuck on the outside).
5.Place the container into a pressure sealed drum, suitable for storing biohazardous materials (must have a biohazardous symbol and radioactive symbol on the outside).
6.Place the drum into a computer-monitored, liquid nitrogen cooled freezer case that is constantly at 221K (-53 celcius)
7.Have the freezer case stored in a bunker with lead-lined concrete walls a minimum of 1.5 m thick (1.6404 yards).
Alternatively follow steps 1 and/or 2 and store it in the freezer. Works fine for me.