二つ (futatsu) means “two” | MotiTan Japanese Dictionary

More examples

私は毎朝、卵を二つ食べます。watashi wa mai asa tamago o futa tsu ta be ma su

I eat two eggs every morning.

Shows that two items or things are being counted with the broad Japanese counter used for general objects.

二個niko: A way to count two separate objects using the counter for individual items.

物や事柄を一般的に数えたときの二個分を表す語。mono ya koto gara o ip pan teki ni kazo e ta to ki no ni ko bun o arawa su go

二つ (futatsu) belongs to the native Japanese counting series using つ (tsu) for general units, with ふた (futa) providing the meaning "two".

The expression 二つ返事 (futatsuhenji) means accepting a request readily rather than replying twice.