Give rice cereal to 3 wks old baby

Myia • 28 year old first time Mommy with twin boys born Nov 14th 2016..mommy so in love with Mekhi & Malik❤❤❤❤
My twins wake up way too much during the night and doesn't seem satisfied with the bottle...is it ok to give my babies rice cereal in their bottle at night to sleep longer at this age??