I was wondering if this kit was plastic or glass, they did not find explicit mention in the description. It is plastic. Namely, there are the same glass. This range of Philips Avent products is really a great value. Since I tested, I try to buy up to the mark. This kit contains 2 large bottles (260ml), two small (125ml), a cleaning brush (which I find for my part more convenient than the usual bottle brushes) and a teat. I urge young mothers, or mothers, to test this range, they will be quickly conquered.