Final Fantasy VII

Assuming you ARE inside the crater, the fastest way to get them is steal it from master tonberries.

does W-Item trick solve your problem? and this is THE FASTEST WAY TO GET ELIXIRS OR ANY ITEMS THAT IS USABLE IN BATTLE...

Please tell me exactly how to do this trick. I've tried but always failed.

To use W-item trick:
1. Equip W-item materia on a unit.
2. Enter the battle
3. Choose W-item command.
4. Scroll down to Elixir, select it and press OK.
5. Select a character for the Elixir to be use on (Don't worry, you cancel it later) and press OK
6. Scroll to another item well away from Elixir, so that is no longer visible in the list. Select it.
7. Press OK.
8. Instead of selecting a character, press Cancel. Now the number of your Elixir must have increased.
9. Repeat from step 7 for more Elixirs.