Paint thinner can leaking
When containing petroleum-based solvents it is best to place them in a metal or glass jar that can be sealed. Empty paint cans or preserve jars work well (but be sure to re-label the new container to avoid it being misconstrued for anything other than it is).    Trying to patch an opening with tape on a solvent filled vessel will not hold very long as the solvent will dissolve the adhesive. A better solution to patch the can is to wrap it with foil and than tape. Or transfer the thinner into another container.    Another temporary option is to pour the liquid into an empty five gallon bucket no more than half full. Leave the bucket in a place that will not get it spilled. The solvent will evaporate in several days.