1. Store the cookies in an airtight tin.

2. Biscuits will stay crisp if you keep them in an airtight tin.

3. Store the cake in an airtight container.

4. Store the seeds in an airtight tin.

5. Keep the seeds in an airtight container.

6. The police verified that she had an airtight alibi.

7. Store the beans in an airtight jar.

8. Store the peppercorns in an airtight container and grind the pepper as you need it.

9. Clean the seal on/around the fridge door regularly so that it remains airtight.

10. Biscuits will stay crisp if you keep them in an airtight container.

11. Food will last longer if kept in an airtight container.

12. Store cookies in an airtight container.

13. Seeds are best stored in airtight containers.

14. Mick had an airtight alibi.

15. When cold, pack into an airtight container and store in a cool, dry place.

16. Scamp had an airtight alibi, naturally, but then again young Leakey never said who exactly had done it.

17. Freeze or prepare a day ahead of the party and store in an airtight container.

18. If hydrogen sulfide or some other poisonous gas is detected, Donahue dons an airtight breathing device and a hard hat.

19. He wears a white helmet that is sealed to his airtight suit and he strides to the unmarked plane without delay.

20. Uncooked madeira cake mixture can be frozen in an airtight container.

21. Are your containers temperature-controlled, water-tight and air-tight ?

22. Unfortunately, this air-tight seal is often hard to maintain, especially if passengers want to walk between cars.

23. BlackBerry's nearly air-tight encryption has come under scrutiny in several overseas markets recently.

24. From the air-tight chambers of the screws the raw oil shale is poured into the inner recess of the aerofountain drier (hereinafter AFD).

25. When no vapors are present, he simply wears the hard hat. Hard hats, of course(sentencedict .com), are not air-tight.

26. This decomposition, called aerobic, does not occur when the substrate medium is air-tight.

27. For carrying goods liable to be spoiled by damp or water they have the advantage of being both water-tight and air-tight .

28. All it takes is a tiny hole in an air-tight suit or a window left ajar in a supposedly air-tight lab, and you can wave goodbye to your friends, family and 100 million others.

29. Once you get it home, you just wanna be sure to store it in an air-tight container, or in the box that it comes in.

30. The builders used a fog machine, borrowed from a DJ who uses it in his gigs, to test how air-tight the home was.