"A clear glass bottle."

Glass bottles may contain the following: cloudy white liquid: balm (healing potion); clear liquid: water/poison/nitro; clear dark purple liquid: wine (slows poison to every 2 rounds); clear red liquid: strength; intensely yellow, almost orange liquid: orc urine.

"A green glass bottle."

Glass bottles may contain the following: cloudy white liquid: balm (healing potion); clear liquid: water/poison/nitro; dark purple liquid: wine (slows poison to every 2 rounds); clear red liquid: strength; intensely yellow, almost orange liquid: orc urine.

"A clear bottle made of yellowish glass."

Glass bottles may contain the following: cloudy white liquid: balm (healing potion); clear liquid: water/poison/nitro; dark purple liquid: wine (slows poison to every 2 rounds); clear red liquid: strength; intensely yellow, almost orange liquid: orc urine.

"A black ceramic bottle."
"A clear liquid with a powerful odor."

Contains naphta or nitro (acts similar to Bonfire spell).

"A clear glass bottle labeled 'Dr. Taylor's Snake Oil and Hair Tonic.  Cures all ailments.  130 proof'."
"Inside you see a clear liquid."

Cures blindness, but stuns you at the same time.

"A blue enamel flask."

Contains wine, beer, nitro or a potion of protection from poison.

"A steel bottle stamped with the icon of a bull."
"Dark crimson liquid that smells of earth and mushrooms."

Contains a strength potion.

"A fat-bottomed clay bottle with a thin tapering neck."

Contains wine or nitro.

"A burnished steel bottle with the icon of a falcon."
"Clear jade colored liquid that smells of jasmine."

Restores stamina.

"A pale-blue bottle streaked with white lines."
"Clear, jade colored liquid that smells of jasmine."

Restores stamina.

"A silvery glass bottle adorned with blue wave motifs."
"Amber liquid that smells faintly of orange blossoms."?

Restores mana.

"A white porcelain bottle adorned with red lotus blossoms."
"A white porcelain bottle decorated with red lotus blossoms." - item data
"Amber liquid that smells faintly of orange blossoms."  

Restores mana.

"A porcelain bottle with small irises in raised relief around its base."
"Creamy white liquid with the strong odor of vanilla."

Permanently raises charisma (up to 17).

"A black ceramic bottle with small gold whorls around its base."
"Cream white liquid with the strong odor of vanilla." - charisma
"Glistening silver fluid with the faint odor of mint." - dexterity

Permanently raises dexterity (Lich Twins) or charisma (Carfel) (up to 17).

"A small porcelain vial."
"Deep blue liquid, with a slight head of foam."

Drake potion, permanently raises constitution by 2 (up to 18) and increases hit points by 4 and stamina by 4 (if below maximum hps or 120 stamina). Found on drakes.

"A porcelain bottle stamped with a golden sun."
"A porcelain bottle stamped with a gold sun." - item data
"Golden wine perfumed with the scent of wildflowers."

Permanently raises intelligence (up to 17). Found in giant's lair.

"A sky blue porcelain bottle."
"A viscous silver liquid."

Permanently raises mana by 6 (if below maximum). Obtained by completing the Kobold Princess Quest.

"A reddish clay bottle with three black concentric circles painted on one side." 
"Dark crimson liquid that smells of earth and mushrooms"

Permanently raises strength (up to 17).

"A heavy glass bottle mounted on a gold base and set with emeralds." 
"Smooth gray liquid suggestive of tart apples."

Permanently raises wisdom (up to 17). Found in Ydnac's lair.

"A large silver bottle encrusted with sapphires." 
"Bluish liquid with tiny bubbles."

Restores your age to young.

"A small metal vial."

Permanently raises wisdom (up to 17). Sometimes dropped in the Princess Ianta Quest. - Angry

"Dark brown liquid with the aroma of roasted coffee beans."

Sold in taverns, found in a mug or wine bottle.

"Shimmering green liquid flecked with gold." - protection from poison? poison?
"Intensely yellow, almost orange liquid with an almost overpowering stench." - Orc urine