Tā měitiān gěi háizi hē yì píng rǔsuānjūn yǐnliào.
She gives her child a bottle of lactic-acid bacteria drink every day.
Tips
mistakes
乳酸菌饮料 is the small sweet bottled drink category (养乐多 Yakult, 味全, 伊利每益添); it is mostly water plus sugar plus probiotic cultures. Don't confuse it with 酸奶 (yogurt), which is thicker, has much more milk solids, and is not a drink in the same sense.