Personalize your keychain with special booster packs! Fillable shaker keuchains are the best if you ask me. I always want to open keychains and play with the little things inside. Well now you can AND add your favorite charms with this Gentlemon Fillable Keychain! Each booster pack has 3 new Gentlemon charms and 1 special ball charm so you can add or completely replace the starter keychain contents. Each booster pack color has different possible designs, so pick and choose your favorites or collect them all!