Avent anti colic bottle

Hi mummies anyone using avent’s anti colic bottle for their baby? Ive been using avent natural bottles since born and recently tried the anti colic one as he got gas and colic but baby kind of dont like the bottle or the teat. He’s having a little difficulty trying to suck the milk out using the teat and gets tired ? And doesnt finish his milk. Should i just stick to avent natural?