The Tommee Tippee Closer to Nature Advanced Comfort Starter Set is designed for babies with excessive reflux and wind. The super sensitive, unique tube and valve system provides optimum venting so baby takes in more milk and less air. The venting system is designed to reduce feeding problems like reflux and wind. They are BPA free and safe for use in steriliser and dishwasher. Includes: 2 x 150 ml Closer to Nature bottles 2 x 260ml Closer to Nature bottles 2 x Closer to Nature medium-flow teats