It's called a 'Healing Kit bag' - the clue is in the name, really - it's for healing items...
Healing kits, potions (we'll allow all potions as they are in bottles, although remember there are potion cases out there). Wands (2x1), rods (3x1) and small items (1x1) that have healing spells as charges or uses/day.
If you're not sure about anything, just use one of the normal magic bags.
Once again, use common sense. Don't try to find every possibly way of getting around rulings with technicalities. The rules are in place across all containers because of people abusing certain ones.
We are NOT going to write out a comprehensive list of what is and isn't allowed in each type of container because:
A) We shouldn't have to
B) We have better things to do, like building new areas, scripting, DM'ing, helping people, answering sensible questions etc, etc, etc.
[i]"Men never do evil so completely and cheerfully as when they do it from a religious conviction." [/i]
Blaise Pascal (1623 - 1662)