Assalam sis, pastu tunggu masa dia lapar betul-betul lah cuba ulit botol baru, sometimes kalau tummy okay, rejection tu sebab timing je, bukan botol. A few of us tried multiple bottles before our babies accepted one, and honestly memang trial and error process dia. Since you're going back to work soon, maybe tanya childcare provider dia apa botol yang work best untuk routine mereka, pastu stick with that je kat rumah gak so baby consistent. Kalau dia stubborn sgt dengan bottle, don't stress, many babies eventually accept when they really hungry, especially when mama's not around. All the best with work transition, sabar ye!