R／B Crystal Holder

R/B Crystal Holder (ルーブクリスタルホルダー) is are containers used by Katsumi and Isami to store their R／B Crystals. Rosso's is called the R/B Crystal Holder Rosso (ルーブクリスタルホルダーロッソ) and Blu's is the R/B Crystal Holder Blu (ルーブクリスタルホルダーブル)

Usage
It is a simple case that opens up to reveal slots that store up to 4 R/B Crystals.