How do you make glow stick juice?
What happens if you take 2 styrofoam cups and fill one with cold water and one with hot water and drop a glow stick in each?
No, the chemical in glow sticks is only toxic if ingested in very large quantities - more than an entire glow stick contains. The cat will most likely react to the awful taste but should be able to get rid of it within a couple hours. You can help by offering broth or tuna juice with water. If the cat is exhibiting any symptoms after 24hrs, take him to the vet.
The better question is does a glow stick glow longer in hot or cold environments. Here since its a chemical reaction heat acts as a catalyst and speeds up the process. So in warm weather you'll get brighter glow that lasts significantly shorter then a glow stick in a cold environment. Funny enough if you cool down a glow stick enough (about -60 F) then the process will stop altogether.