1. Stable stacking with 6mm hidden caps. 2. Strong durability and corrosion resistance achieved through the application of the HTS process. 3. Strong sealing power with Lock & Lock's four-sided closure cap. 4. Easy cleaning with exposed silicone packing. 5. No worries about color or odor retention with the stainless steel 304 body. 6. Clean design with an edgy green color.