More to explore:
Seal a plastic bag with the top of a water bottle or any plastic bottle and the lid.
Seal plastic bags with the tops of water bottles.
Seal a plastic bag with the top of a water bottle.
use the top of a disposable water bottle to create an airtight lid on a plastic bag
plastic bottle caps
Recycling Plastic Bottle Water Filter
That's awesome. Need this.
Brilliant, trying this!