I find that the "double zip" on these isn't exactly accurate, and it doesn't feel overly secure. Granted i haven't had a leak yet but they don't seem to be very secure, especially when frozen. The milk is really tediously sitting right at the zip line.
The tear open to out the milk in is not very user friendly either, and the details section is very small to fill in. Probably wouldn't buy these again.
|Product Dimensions||10.5 x 12 x 16 cm; 600 Grams|
|Material free||BPA Free|
|Item Weight||600 g|
|Country/Region of origin||Korea, Republic of|