Yes, I'm like thousands of modelers who have watched in horror as a full, uncapped bottle of styrene cement took a slow-mo tumble, spilling it's expensive contents onto the workbench. I've also seen numerous ways to keep the liquid cement up-right to avoid potential spills and the resulting swearing.
The best known solution to keep the 'solution' rightside up is to cut a small square of wood and drill a hole the diameter of the glue bottle half-way through in the middle of the wood. Insert glue bottle and call it a day.
Well call me lazy, but I just haven't gotten around to finding a piece of wood, pulling out the saw, making the cut(s), measuring the bottle, going to the hardware store to purchase a drill bit that size, coming back home, finding the drill and a drilling a depression in the piece of wood.
While waiting for Tenax 7R “Space Age Plastic Welder” cement to dry on the styrene supports of a scratch-built bulk sugar hopper car unloading shed I'm building for my HO scale Big Island Rail layout, a plastic rattle can spray paint lid sitting on my work bench caught my eye. In the center of the overturned cap was a second molded circle that looked like it could be the same diameter as my bottle of Tenax. The light bulb came on over my head for a cheap hack to keep the bottle from being tipped over accidentally.
Being the daring modeler I am, I picked up the Tenax 7R, screwed the lid back on, and shoved it into the spray can lid. Boom! It fit! It's very snug, but it worked. The bonus is the outer ring of the lid serves as a brush holder. I do not know if this hack will work for other bottles of liquid styrene cement, but it might.
Disclaimer: I'm sure if you try hard enough, you will still be able to knock your uncapped bottle of styrene cement over in the paint can cap, spilling it's flammable contents all over your work bench in even a broader swath thanks to the attached spray bottle cap. Don't ask me how I know this!