According to a first embodiment, a nipple for a feeding bottle or a soother comprises a base portion, a teat portion, an areola portion and a flex region allowing flexing of the teat portion towards and away from the areola portion. According to a second embodiment, a nipple for a feeding bottle or soother is provided with a helical flow formation on the inner face of the teat, which allows continuous flow of liquid even when the teat collapsed via the helical flow path which allowing extension at the teat, in particular rotational or torsional extension.