I use the gallon size Ziploc bags to make my monthly meal prep a breeze. I make the food directly in these bags and seal them to freeze. I have never had one of these bags leak on me.
I buy Ziploc because I trust the quality of the bag. I bought some cheaper bags and they opened up in my frigerator and made a big mess. They are a great brand and have never had any problems with them opening back up.