I use these large bags in my sewing shop to store wool fabrics. I personally like slider bags because I can adjust the closure. I can squeeze the excess air out of the bag and seal it tightly or leave it open to allow air into the bag. I haven't tried these liquid packs but I think I would be skeptical if I did. Due to the weight of the liquid and the sliding mechanism. A larger ziploc seal would be better for "leakproof".
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