Instruct: Classify a given review as either positive or negative.
Query: Worst product ever!

I bought these bags for storage purposes.They are made of such low quality materials, they lost their vacuum after a few hours, they began to leak and I had to use duct tape to seal the seams, then when I thought they were finally sealed I put them away only to discover they were fully inflated again the next day.Total crap. Not as advertised at all.Essentially, they are just big ziploc bags. Except, I think ziploc would probably make a better storage bag.Has anyone else put out a better version of this product? Better quality materials that actually stay sealed?What a waste of money!