Lock & Lock is a South Korean plastics company, headquartered in Seocho-Dong Seocho-Gu Seoul, Korea. Established in 1978, the Lock & Lock line of products has been highly successful in competing with global brands like Ziploc, Tupperware, and Rubbermaid.
Lock & Lock products are touted to be leakproof, waterproof containers that can be stacked, flipped upside down, and turned on their sides with no leakage. They have a patented 4-side-locked system that keeps moisture out. Many Koreans use these products for storing their kimchi as it prevents odor leakage.