Reusable Sealing food bags (Japantown, San Jose)

Two styles: the first are heavy silicone with a plastic slide bar that seals the bag. They seal well, but are a little heavy and may smash delicate foods like popcorn or chips. Each bag holds 4 cups and it'll sit upright when it has enough contents to hold it's shape.

The second are ideatech brand and resemble flat Ziploc bags, but they can be challenging to zip. I also find the yellow ones (10 oz out 1.25 cups) a weird size/shape for food. The blue ones hold 30 oz out 4 cups.