i used brand like nanny and recently convert to pigeon and alternating between both. i also lost a lot of milk when using nanny previously. but i suspect i tend to put too much in one pack.
try to put lesser in each bag, before u zip up, remove as much air as possible. lay the milkbag flat to freeze, then once frozen the. arrange in standing position if u want.
see if it helps.
pigeon and nanny both uses gamma ray (highest standard of steraliZation)
pigeon and nanny are the 2 best milk bags i found to be. tollyjoy stop production due to dunno watever reason.
i agree sometime pigeon and nanny bags will break but guess is either store too much in 1 bag or dropped the bag when milk is frozen.
i had lost quite a number too but is becoz of my own mishandling. overall these 2 brands are still best i feel.
I've been using pigeon since day 1 and thankfully never encounter this problem. I only stored up to 150ml. I try to remove as much air as possible and store in vertically.. I don't store it lying flat although I know I can save space by doing so.