Is it a section that would be submerged?
You might be able to melt it together with a little torch, I don't know if that would work or not, that also might release some chemicals though.
Other option if it's not submerged would be good ole duct tape
But in all seriousness I would check Home Depot or Lowes and see if they have some inexpensive Rubbermaid Brute containers that would be the same size as you have. It would be a lot safer option for your floor and cheaper than a wet dry vac that you will need to clean up the mess if the other container breaks.