A friend sent me this on how to reuse plastic bottles to use as sealer and make it airtight.
Cut up a disposable water bottle and keep the neck and top, as in photo.
Insert the plastic bag through the neck and screw the top – to seal.
The bottle is made to be air-tight, such that water will not leak,
the secret lies with the top and screw!
This is a great idea to share. Good for us and the environment too.