The second brand of breastmilk bag that I have tried is from Mother-K. I noticed that this breastmilk bag is usually on the Top 3 of breastfeeding mothers' favourite breastmilk bags here in the Philippines. It's a Korean brand and I have been obsessed with baby stuff from Korea. I just think they're well-thought of.
Mother-K can store up to 7oz of breastmilk. It has double zips to ensure no leaking. And it also has a color indicator to determine whether the milk is too cold or too warm.