What to use to extinguish a spreading fire caused by a lit candle if not water?

Edited to add (emphasized part)
https://candles.org/fire-safety-candles/
“When Extinguishing a Candle:”

“Use a candle snuffer to extinguish a candle. It’s the safest way to prevent hot wax from splattering.”
“Never use water to extinguish a candle. Water can cause the hot wax to splatter and might break a glass container.”
What are the options?
And is there no other problem (other than the glass breaking)? I know the quotation/website I picked is not about a spreading fire caused by lit candle, it’s about how to extinguish just a lit candle. But that’s the only website I coud find related to the words “candle/fire”. It never occured to me that there could be a website on just how to extinguish a lit candle.