Medela breast milk storage bottles are BPA free and are designed to fit all Medela breast pumps.Medela bottles are narrow-neck bottle. The box contains two 250ml bottles. We also carry smaller 150ml bottles. Contents: 2 x Bottle, Collar, Storage disc (as shown on product image) Note that these bottles are made for EU/Asian market and are of much higher quality than Medela storage bottles made for US market. US-made bottles feature thinner plastic that tends to deform when bottles are sterilized. EU-made bottles are made of much thicker plastic.