Aw hirap talaga ng last-minute hunt, pero try mo Robinsons Marikina or SM Marikina kasi usually may baby section sila with bottle warmers na ready to pick up! Another option ay mag-check ka sa Puregold or Mercury Drug sa area mo since some branches carry them din, or if you want guaranteed availability, Lazada/Shopee have same-day delivery options sa Marikina na pwedeng umabot within hours pa lang, lalo na kung may nearby warehouse sila. One of my mum friends swears by Avent and Chicco warmers kaya siguro available yun, pero ang safest talaga ay mag-call muna sa store before going para sure they have stock.