Depends on what you're trying to get from your workout. If you're looking for caffeine, and you don't drink much of it, I wouldn't say grab a Bang or a Reign, since they have 300mg of caffeine, but you could go for a 8-12 oz sugar free red bull. Obviously if you have any medical conditions you'd want to talk with a doctor first, which is common sense but should still be said.
If you're getting tested in the NCAA, 15 micrograms per millimeter (which if you ingest 500mg of caffeine within 2-3 hours of competition) may likely result in a positive test.
If you're trying to get more available energy through creatine, you're honestly better off just buying creatine and mixing it in water rather than getting it from a pre workout (because you won't get enough otherwise). So, what you can do is take 20g of creatine a day (which is split into 4 doses of 5 grams per day) for 5 days, and then just 5g a day after that.
Meaning 5x1, 5x1, 5x1, 5x1 <---- day 1-5
Then 5x1 day 6 onwards.