airtight
adjective /ˈeətaɪt/
  /ˈertaɪt/
- not allowing air to get in or out- Store the cake in an airtight container.
- (figurative) an airtight alibi (= one that cannot be proved to be false)
 Oxford Collocations DictionaryAirtight is used with these nouns:- container
- jar
- lid
- …