
I mainly use them for cold oats. They are "hermetic" in that the dome of the lid actually rises due to air pressure after the lid is closed. Nothing has spilled yet, but on the way to work I zip the containers into a gallon and then into a roomy bag so nothing can cut/snag/break the lid during transit. Hats are not easy to put on, some say. , but I think they have problems because the lid is not tightly closed. You need to hold it in your hands like you are holding a turtle and press your palms against the lid and you will hear sure clicks as you turn it until it clicks all around the container and is "sealed". there were no problems with cracked containers or lids during transport. Mine (ordered twice so far) arrived in perfect condition.

Contigo West Loop AutoSeal 20 oz Matte Black Travel Mug: Double Wall Insulated Excellence
48 Review

3 Compartment Lunch Box Bento Box For Adults, Kids Food Containers With Flatware Included - Leak Proof Microwave Safe (Champagne)
32 Review

Sorbusยฎ 3-Tier Stackable Wine Rack - Classic Style Wine Racks For Bottles - Perfect For Bar, Wine Cellar, Basement, Cabinet, Pantry, Etc - Hold 12 Bottles, Metal (Copper)
34 Review

Preserve Fresh Herbs With Prepara Herb Savor Pod 2.0
45 Review

MaidMAX Storage Bins 12X12X12, For Home Organization And Storage, Toy Storage Cube, Closet Organizers And Storage, With Dual Plastic Handles, Black, Set Of 6
32 Review

Set Of 8 Royexe Storage Cubes With Dual Plastic Handles - Foldable Fabric Bins For Closet Organization And Drawer Storage - Light Grey
29 Review

Organize Your Home With 11-Inch Beige Storage Cubes: Set Of 8 Fabric Collapsible Bins With Dual Handles!
29 Review

Set Of 3 PRANDOM Foldable Linen Fabric Storage Boxes With Lids - Collapsible Bins For Home, Office, Closet, Nursery - Organizer Containers With Covers (14.9X9.8X9.8 Inches)
28 Review