Hi sis! A few of us moms actually just use a regular cooler bag with ice packs or a small regular fridge naman, honestly hindi na kailangan ng special mini fridge, mas mahal lang at hassle sa space haha. For thawing from the regular fridge, just move it to room temperature gradually or put the bottle under warm (hindi mainit na!) running water para ma-thaw slowly, kasi if you heat it too fast the nutrients break down, yan ang sinabi ng pedia namin!