15ltr water containers are the best. Mutli purpose at its best for me. I collect these from a cleaning job I do.
I use them to make my guinea pig poo tea, door weight for my shed, holding rain water, Tyler loves to throw them around. Inside as small propergating tanks and my fav for early out door plants covers and use the bottoms to hold more water for potted out door plants. I see my neighbour cottoned on and she grows her herbs in them.
I would to hear if you have anymore ideas I can use them for.