"I'm....not sure. I mean, these are people I know and work with. I suppose if they're sick and they attack us I don't have much of a choice but to defend myself. But I'd rather not kill anyone if I can help it. I...I just don't know. I've never dealt with something like this before."

Aerhalyss:
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The empty bottles are just empty, filled with mundane air. The filled bottle contains a low-level casting of Mage Armor (+4 AC). It probably won't last longer than an hour or two. The vial's contents are rather oily in appearance, exhibiting the traits of the Magic Stone spell. (Up to three small stones receive a bonus of +1 to Attack and Damage when used as a ranged weapon, resulting in 1d6+1 damage, or 2d6+2 against undead.) The green feather is a Feather Token: Tree. (It causes a great oak tree to appear instantly, 5' trunk diameter, 60' high, and a crown of 40' in diameter.)
It would seem that these items have been regarded as generally useless by the patrols, which would explain their presence.