I used Lansinoh BM freezer bags with no problem for DD#1 and now am doing the same for DD#2. The last 2 weeks when I go to thaw them on Sunday night for Monday's bottles, I come back 20 minutes after taking them out of the freezer and they have leaked my precisou BM all over the counter. Last night, I checked on them after 10 minutes and no leaks, so I went to fold laundry, etc. and when I got back, there was about 5 oz. of milk on the counter. Has anyone had this issue before? They don't leak when I freeze the milk, so I don't know what is going on. maybe I need to thaw under water more quickly so as not to give a chance to leak, but I don't want the BM to heat up at all, since it won't be used until the next day. Maybe I need to thaw them standing up?