Warning Spoiler Alert: This article or section contains details about plotlines not covered in the anime. Do not proceed unless you wish to be spoiled.

A Crystal Bottle of Kales'Oh (カレス・オーの水晶瓶, Karesu Ō no Suishōbin?) is a multi-use item that can be used to store the proficiency of an equipped skill to open up a skill slot without losing progress in the removed skill. The bottle is a possible drop from a Forest Elven Hallowed Knight that can be encountered as part of the first chapter of the Elf War campaign quest on the 3rd Floor of Aincrad in Sword Art Online.[1]


Official DescriptionEdit

This bottle allows you to save the proficiency of any skill currently equipped in a skill slot.


Usage NotesEdit

Before the bottle is used, the user needs to use the properties window to select the skill they would like to store in the bottle. A skill already stored in the bottle can be retrieved by pulling out the stopper and inhaling the light-turned liquid inside the bottle. To store a skill already equipped, the user exhales their light-turned skill into the bottle, and the light turns into a liquid, the colour of which depends on the stored skill.[1]


Instance Description
Light Novel Anime Manga
Progressive Volume 3, Barcarolle of Froth, Part 2 Asuna used the bottle to retrieve her Tailoring skill previously stored in the bottle and to store the proficiency of her Sprint skill to open a slot for the Tailoring skill.
Progressive Volume 3, Barcarolle of Froth, Part 7 Asuna used the bottle to re-equip her Tailoring skill to craft a swimsuit for herself, a pair of black boxers with an orange bear patch as a Christmas present for Kirito, and later, a swimsuit for Kizmel.



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Argyro's Sheet - Blackwyrm Coat - Coat of Midnight - Cor - Crystal Bottle of Kales'Oh - Crystallite Ingot - Crystals - Divine Stone of Returning Soul - Dusk Lizard Hide - Eternal Storage Trinket - Hand Mirror - Mighty Strap of Leather - Mirage Sphere - Pneuma Flower - Potions - Ragout Rabbit's Meat - Ring of Agility - Ring of Angel's Whisper - Scavenge Toad Meat - Tremble Shortcake - Vendor's Carpet - Yui's Heart
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Project Alicization Black Lily Sword - Blue Rose Sword - Conflagrant Flame Bow - Divine Object - Dragon Bone Axe - Fragrant Olive Sword - Frost Scale Whip - Gigas Cedar - Goblin Sword - Heaven Piercing Sword - Night Sky Sword - Silvery Eternity - Time Piercing Sword - Twin Edged Wings
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