Both of these should only be acquired by chance through Hunting (% chance related to Hunting Skill/Level)
Attraction Vial (Tan): Found during hunting either off of fallen humans or found in stores/homes. What it does is attracts humans to you making for more battles and less of everything else. A possible trade off is that it attracts some stronger than normal humans for your location.
Soul Vial (Cyan/Turquoise): Found during hunting either off of fallen humans or found in stores/homes. What it does is Give you a bonus amount of Souls when used (5 Souls). Chances to find are less than previously mentioned Pink Vial, but chances increase when fighting Pink Vial enhanced humans.
If found primarily through the "Break In" feature this would give users a reason to slow down while hunting, and thus further prevent site slow downs caused by Hunters (without limitations, but rather for our benefit), to keep an eye out for that link. (I know I used to pretty much ignore it and keep going, not caring about the relatively miniscule amount of money)