I hate emptying a toilet of its residual water by the repetitive process of soaking it up with a rag and then ringing it out in the sink or a bucket. There has to be some sort of manual, hand-held pump that I can use to remove the bulk of the water, leaving just enough left over that I can get it in one shot using the towel method.
You can make a siphon. Get a jar with a plastic lid. Get some surgical tubing. Drill two holes in the lid slightly smaller than the tubing. Insert a longer piece of tubing into one hole, pushing it down near the bottom. Insert a shorter piece on the other side, keeping the tub end nearer to the top of the jar. Put the other end of the long tube in the toilet. Now suck the water into the jar. Once the water starts entering the jar gravity will take over and finish the job provided the jar is lower than the bottom of the toilet.
Or, as suggested, if you can live with it not being hand held, a wet/dry shopvac is probably the easiest way to go about it.