Reddit mentions of 1.5mL Microcentrifuge Tube snap Cap 50/pk

I work in a lab, so I'm around these all the time. They are great for storing liquids in your altoid tin. You can easily fit 3 in the tin stacked by opposing them with plenty of room to spare for other gear. You could probably jam as many as 8 or 9 in there if you aren't putting other stuff in.

Each one holds 1.5mL. This is a useful quantity for many things. If you fill one with bleach, you can use it to sanitize 1 gallon of water for drinking/cooking (the CDC reccomends this ratio for emergency water sanitation, but I wouldn't drink bleach unless I really had to) Mixing it with a cup of water will make a good surface disinfectant. I store hand soap in another one- 1.5mL is enough to wash your hands once.

I use my tin for general survival and not just first aid, so the other tubes I use to store matches and an alcohol soaked cotton for fire starting. You could store pills or liquid medicine as well, since they are watertight.

For those of you who want to use a needle and thread for emergency stitches but don't have access to an autoclave (steam sterilizer) I suggest that you wrap up a pre-threaded needle in a bit of tin foil and put it in a pressure cooker. Use the 15lbs setting and add 1 cup of water (make sure you have a rack or something to keep the needle from actually getting wet). cook for 45-60 min and let the pressure come down gradually (don't put it in the sink). These are similar conditions for sterilization that we use in the lab so it should keep your needle and thread sterile for a long time as long as you don't open the tinfoil wrapper.

I will post my own kit at some point. I just need to to find the time.