An infant bottle (10) method and kit, wherein the bottle comprising: a disposable bag (20), for containing a beverage (30, 44, 46)； a foldable bag frame (16), for deploying therein the disposable bag (20) at a deployed state of the foldable bag frame (16), wherein a folded state thereof occupies less space than an unfolded state thereof； and a teat (14), for covering the disposable bag (20) in a sealed manner, thereby resulting in a compact infant bottle (10) at a folded state of the foldable bag frame (16), and sealable upon deployment.
