| If you prefer a perfumed oil, combine 10 to 20 drops of any essential oil and 1 ounce of jojoba oil in a glass bottle with an airtight lid. |
| Most modern stoves are airtight and allow the amount of combustion air that feeds the flame to be controlled. |
| This means that coffee should be packed in an airtight foil laminated bag with a one-way air valve to allow the bag to de-gas. |
| The limes are quartered, steamed, combined with oil fragrant with aromatic spices, vinegar and salt then stored in airtight jars. |
| The basic idea is to make an effectively airtight wall by sealing the exterior sheathing and the interior wall finish to the framing. |
| Seal the drying salt in an airtight container such as a glass jar or plastic tub. |
