Honestly, kebanyakan cases kembung itu lebih pada technique feeding dan burping daripada brand botol je, tapi puting yang terlalu rata or hard boleh make baby telan lebih banyak udara. Silicon nipples biasanya lebih lembut dan closer to natural feel, so a few of my mum friends actually prefer those for reducing gas, Momo House's silicon ones dapat decent reviews, tapi best approach is try both because setiap baby lain, some prefer firm nipples, some soft ones. Lepas feed, make sure you're burping properly and jangan rush sesi feeding, kalau baby minum terlalu cepat, air masuk sama udara. Kalau persisten baby kembung, boleh check dengan paed sebab bisa jadi formula intolerance or positioning issue, bukan botol je. Let me know how it goes, sometimes kita kena trial and error sikit!