eli5: Why do slot machines have „[BAR] as a symbol?

bar bar slotWhat does the BAR symbol mean on a slot machine? The BAR symbol orinated from the Bell-Fruit Gum Company, which used the logo to represent their brand on(Pragmatic Play) Slot Review · Title: Barbar · Developer: Pragmatic Play · Reels: 6 · Rows: 5 · Pays: Scatter Pays · RTP: 96.50% · Max Win: 15,000x