Nouns ending in -al, -el, -il, -ol, or -eul are usually masculine.
The whole family: -al, -el, -il, -ol, -eul. All masculine.
Is bol masculine or feminine?
lebol
The rule behind it
96.5% of -al / -el / -il / -ol / -eul nouns are masculine
In context
Elle a versé le lait dans un bol.
She poured the milk into a bowl.
Tom a versé des céréales dans un bol.
Tom poured some cereal into a bowl.
Est-ce que tu as un bol plus grand ?
Do you have a bigger bowl?