Fullbottles

Fullbottles (フルボトル) are the sample bottle-like collectible devices used by the transformation gear in Kamen Rider Build.

Overview
The Fullbottles were created by Takumi Katsuragi as part of Project Build. They contain purified Nebula Gas to allow a person with a Hazard Level of 3 or higher to transform into a powerful armored form with the Build Driver or Transteam Gun. The Driver, and several Fullbottles were stolen by Soichi Isurugi as he rescued his daughter Misora from Faust. In order to protect Misora from Faust, Soichi gave the Driver and the Fullbottles to Sento Kiryu, judging him to be the best choice to use it.

After Build defeats a Smash, an Empty Bottle (エンプティーボトル) is used to absorb the Nebula Gas from the victim, causing the Bottle to swell and gain a black spiderweb pattern and a Transgel Solid inside (often colored after the Smash, not the Fullbottle it will become). Through a mysterious power held by Misora Isurugi, her gold bracelet, and a modified microwave machine in nascita's basement made by Sento, the harmful properties are purified, leading to the creation of a Fullbottle which can then be used by Build. Sento's machine isn't needed for the process, but reduces the bout of exhaustion Misora suffers following it from a full week unconscious to only a few hours of tiredness.

Before undergoing the purification process, the contents of an unpurified Bottle can be poured back upon the victim, transforming them back into a Smash. However, if one had their previous Smash Essence extracted, and they use a new unpurified Fullbottle, they will disintegrate and die.

Functionality
Kamen Rider Build transforms by inserting two Fullbottles into the Build Driver and turning the lever. Organic Fullbottles (有機物のフルボトル) are inserted into the right-hand slot. They form Halfbodies that affect the left side of Build's head, his right arm, and his left leg. Inorganic Fullbottles (無機物のフルボトル) are inserted into the left-hand slot, and form Halfbodies that affect the right side of Build's head, his left arm, and his right leg. Any pair of organic and inorganic Fullbottles can be used to create a Trial Form (トライアルフォーム), but each Fullbottle has a Best Match (ベストマッチ) with another one, creating a perfect combination of powers. If they are used together, they create an especially powerful Best Match form.

Each Fullbottle has at least one Best Match with another specific Fullbottle, though individual Fullbottles can have multiple Best Matches depending which Fullbottle is used.

Kamen Rider Cross-Z uses only the Dragon Fullbottle to transform, by inserting it into an adapter called the Cross-Z Dragon, and inserting it into the Build Driver.

Night Rogue and Blood Stalk use the Bat and Cobra Fullbottles respectively to transform by inserting them into the Transteam Gun.

Fullbottles may be inserted into certain weapons such as the Drill Crusher or Beat Closer to activate special finisher attacks. The Lion Fullbottle is used to turn the BuildPhone from phone to bike mode.

Fullbottles can also be utilized to give their users in civilian form temporary superhuman abilities by shaking them (Ex. the Rabbit Fullbottle gives Sento temporary super speed and agility to evade attacks, the Dragon Fullbottle gives Ryuga powerful, fiery punches). Seemingly, the more a Fullbottle is used by someone, the more they synchronize with it.

Design
A Fullbottle consists of the following parts:
 * Shielding Cap (シールディングキャップ) - The cap on top of the Fullbottle. It is a protective valve that prevents the Transgel Solid inside the Fullbottle from leaking out. This is also why the label on the cap must be turned to face forward during transformation.
 * Material Absorber (マテリアルアブゾーバー) - The component on top of the Fullbottle on which the Shielding Cap is located. It is responsible for absorbing Nebula Gas from the Smash and putting it inside the Fullbottle. Additionally, when Build transforms, the Material Absorber is responsible for retrieving and assembling/disassembling Build's equipment.
 * Transgel Solid (トランジェルソリッド) - The liquid inside the Fullbottle. The liquid activates by stimulus, such as shaking, and when activated forms Build's suit and armor.
 * Clear Mold Bottle (クリアモールドボトル) - The exterior of the Fullbottle, holding the Transgel Solid within. The Bottle is molded in a high strength, lightweight material, and the image cast on it shows the hidden ability inside the Fullbottle.

List of Fullbottles
{{#tag:tabber| Standard= {{#tag:tabber| Build= {{#tag:tabber| Organic= These Fullbottles are inserted into the slot on the user's right and are always themed after something organic. They affect the left half of Build's head, his right arm, and his left leg.
 * {{nihongo|Rabbit Fullbottle|ラビットフルボトル|Rabitto Furubotoru}}: Used by Build to Best Match with Tank and access RabbitTank Form. Gives the user increased agility and speed.
 * {{nihongo|Gorilla Fullbottle|ゴリラフルボトル|Gorira Furubotoru}}: Used by Build to Best Match with Diamond and access GorillaMond Form. Extracted from the Strong Smash. {{Storylink|That One with the Best Match}} Gives the user superhuman strength.
 * {{nihongo|Taka Fullbottle|タカフルボトル|Taka Furubotoru|lit. Hawk Fullbottle}}: Used by Build to Best Match with Gatling and access HawkGatling Form. Extracted from the Flying Smash. {{Storylink|Borderline of Justice}}
 * {{nihongo|Ninjya Fullbottle|忍者フルボトル|Ninja Furubotoru|lit. Ninja Fullbottle}}: Used by Build to Best Match with Comic and access NinninComic Form. Extracted from the Mirage Smash. {{Storylink|Borderline of Justice}}
 * {{nihongo|Panda Fullbottle|パンダフルボトル|Panda Furubotoru}}: Used by Build to Best Match with Rocket and access RocketPanda Form. Extracted from the Press Smash. {{Storylink|Moonsault of Anger}}
 * {{nihongo|Harinezumi Fullbottle|ハリネズミフルボトル|Harinezumi Furubotoru|lit. Hedgehog Fullbottle}}: Used by Build to Best Match with Shoubousha and access FireHedgehog Form. Extracted from the Needle Smash. {{Storylink|That One with the Best Match}} Gives the user a spike weapon for melee combat.
 * {{nihongo|Lion Fullbottle|ライオンフルボトル|Raion Furubotoru}}: Used by Build to Best Match with Soujiki and access LionCleaner Form. Also used to turn the BuildPhone into the Machine Builder when inserted.
 * {{nihongo|Dragon Fullbottle|ドラゴンフルボトル|Doragon Furubotoru}}: Used by Build to Best Match with Lock and access KeyDragon form. Extracted from the Burn Smash. {{Storylink|The Innocent Runaway}} Allows the user to punch with incredible strength.
 * {{nihongo|Kaizoku Fullbottle|海賊フルボトル|Kaizoku Furubotoru|lit. Pirate Fullbottle}}: Used by Build to Best Match with Densha and access KaizokuRessya Form.
 * {{nihongo|Octopus Fullbottle|オクトパスフルボトル|Okutopasu Furubotoru}}: Used by Build to Best Match with Light and access OctopusLight Form. Extracted from the Stretch Smash. {{Storylink|Who Takes Off The Veil?}}
 * {{nihongo|Phoenix Fullbottle|フェニックスフルボトル|Fenikkusu Furubotoru}}: Used by Build to Best Match with Robot and access PhoenixRobo Form.
 * {{nihongo|Wolf Fullbottle|ウルフフルボトル|Urufu Furubotoru}}: Used by Build to Best Match with Smapho and access SmaphoWolf Form.
 * {{nihongo|Unicorn Fullbottle|ユニコーンフルボトル|Yunikōn Furubotoru}}: Used by Build to Best Match with Keshigomu and access UniRaser Form.
 * {{nihongo|Scorpion Fullbottle|スコーピオンフルボトル|Sukōpion Furubotoru}}: Used by Build to Best Match with Gold and access GoldScorpion Form.
 * {{nihongo|Tora Fullbottle|トラフルボトル|Tora Furubotoru|lit. Tiger Fullbottle}}: Used by Build to Best Match with UFO and access ToraUFO Form.
 * {{nihongo|Kujira Fullbottle|クジラフルボトル|Kujira Furubotoru|lit. Whale Fullbottle}}: Used by Build to Best Match with Jet and access KujiraJet Form.
 * {{nihongo|Turtle Fullbottle|タートルフルボトル|Tātoru Furubotoru}}: Used by Build to Best Match with Watch and access TurtleWatch Form.
 * {{nihongo|Shika Fullbottle|シカフルボトル|Shika Furubotoru|lit. Deer Fullbottle}}: Used by Build to Best Match with Pyramid and access ShikaMid Form.
 * {{nihongo|Kirin Fullbottle|キリンフルボトル|Kirin Furubotoru|lit. Giraffe Fullbottle}}: Used by Build to Best Match with Senpuki and access KirinCyclone Form.
 * {{nihongo|Penguin Fullbottle|ペンギンフルボトル|Pengin Furubotoru}}: Used by Build to Best Match with Sukebo and access PenguinSkater Form.
 * {{nihongo|Dog Fullbottle|ドッグフルボトル|Doggu Furubotoru}}: Used by Build to Best Match with Mic and access DogMic Form.
 * {{Nihongo|Rose Fullbottle|ローズフルボトル|Rōzu Furubotoru}}: Used by Build to Best Match with Helicopter and access RoseCopter form.
 * {{nihongo|Kuma Fullbottle|クマ フルボトル|Kuma Furubotoru|lit. Bear Fullbottle}}: Used by Build to Best Match with Televi and access KumaTelevi form.

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Unused Fullbottles and Best Matches
Hacking the pin combinations on the DX Build Driver toy reveals sounds for Fullbottles and Best Matches currently not set to be used as real forms or toys.
 * Kyouryuu (恐竜) & F1: "Are you Ready? Onsoku no Teiou! (音速の帝王! F1サウルス!) Yeahhh!"
 * Same (サメ) & Bike (バイク): "Are you Ready? Dokusou Hunter! (独走ハンター! サメバイク!) Yeahhh!"
 * Spider (スパイダー) & Reizoko (冷蔵庫): "Are you Ready? Reikyaku no Trap Master! SpiderCooler! (冷却のトラップマスター! スパイダークーラー!) Yeahhh!"
 * Kabutomushi (甲虫) & Camera: "Are you Ready? Mitsurin no Scoop King! BeetleCamera! (密林のスクープキング! ビートルカメラ!) Yeahhh!"
 * Obake & Magnet (マグネット): "Are you Ready? Samayoueru Chouinryoku! (彷徨える超引力!) MagGhost (マグゴースト)! Yeahhh!"
 * Bat & Engine (エンジン): "Are you Ready? Ankou no Kidou-ou! BatEngine! (暗黒の機動王! バットエンジン!) Yeahhh!"
 * Hachi (ハチ) & Sensuikan (潜水艦): "Are you Ready? Shinkai no Shigotojin! HachiMarine! (深海の仕事人! ハチマリン!) Yeahhh!"
 * Sai (サイ) & Dryer (ドライヤー): "Are you Ready? Jounetsu Tairiku! SaiDryer! (情熱大陸! サイドライヤー!) Yeahhh!"
 * Crocodile (クロコダイル) & Rimokon (リモコン): "Are you Ready? Mizugiwa no Denpa yarou! CrocodiCon! (水際の電波野郎！クロコダイコン!) Yeahhh!"
 * Kappumen (カップ麺) & Energy Drink (エナジードリンク): "Are you Ready? Soukou Genki! CupEnergy! (即効元気！カップエナジー!) Yeahhh!"
 * Ghost (ゴースト) & Ex-Aid: "Are you Ready? Batchi Level Up! GhostEx-Aid! Yeahhh!"
 * Gaim (ガイム) & Drive (ドライブ): "Are you Ready? Kajitsu no Top Gear! GaimDrive! Yeahhh!"
 * Wizard (ウィザード) & Fourze (フォーゼ): "Are you Ready? Maho no Uchu Ryoko! FourzeWizard! Yeahhh!"
 * Kamen Rider (仮面ライダー) & Super Sentai (スーパー戦隊): "Are you Ready? NichiAsa Saikou! Super Hero Time! Yeahhh!"
 * Buttobasoul (ブットバソウル) & Ganbarizing (ガンバライジング): "Are you Ready? Kikaijikake no Touginjou! ButtobaGanba! Yeahhh!"