Negative Positive
Title: Some hold the seal, some don't.
Review: I have called customer service and received tips on how to make sure these bags hold their seals. You push down on the valve before closing it, making sure you also don't overfill them. It's so frustrating because some work, some don't. I always try to refill and seal the bad bags, but the same thing happens. I had SPACE BAG send me replacements thinking maybe they were faulty bags, same thing with the new bags, and it took me months to get new bags sent. I had to stay on top of them to even get the replacements. I also am surprised they are still in business, it's such a great concept but they need to take them back to development.
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