A spell bottle is a bottle into which a magickal spell has been cast in the form of physical items used to ensure that the spell results in the desired outcome.
A bottle spell is a magickal spell that is contained with a bottle and which when finished, is expected to work for the ends one desires. (Make sure you are clear on your intention and the spell is for the highest good, harming none.)
It is believed that they will hold their magick for as long as the seal is unbroken, once the cap/ cork is opened, the spell is broken.
If you wish the spell to be broken, you should dismantle spell bottle and bury all ingredients.