This is my current go to energy drink, its nice and tasty and just a good all around energy drink event if its on the pricey side.
its a cool can but apart from that there is nothing special about it. I Have a large case of them sat under my desk at my full time job,
however it may not be worth the extra money if you just like the look off the can.

Not much more to say really.

Stuff inside according to  urban-drinks.co.uk

Brand 9mm
Type of soft drink Energy drink
Flavour citrus fruit, fruit, lemon, light fruits, sweet
Country of origin Slovakia
Manufacturer or importer 9MM ENERGY s.r.o., Hviezdna 11/20, 945 05 Komárno, Slovakia
Ingredients Water, sugar, acidifier citric acid, carbonic acid (min 4g/l), taurine (0,4%), acidity regulator trisodium citrate, aroma, caffeine (0,03%), vitamins (C, niacin, pantothenic acid, B6, B2, folic acid), colourant: sulphite, ammonia caramel.
Nutritional Values 9mm Energy Drink:

Contains Average per 100 ml
Caloric value: 197.3 kJ (46.4 kcal)
Fat: 0 g
– of which saturated fatty acids: 0 g
Carbohydrates: 11 g
– of which sugar: 11 g
Protein: 0 g
Salt: 0.1 g
Additional information Carbonated refreshment drink with caffeine and taurine. Increased caffine content (32mg/100ml). Pasteurised. Serve ice cold! Not recommended for children, pregnant women, breastfeeding mothers, persons with high blood pressure or heart complaints as well as persons with caffeine sensitivity.

UK Stores
http://www.zerooneairsoft.com/advanced_search_result.php?keywords=40610 (This is where i got my last lot from)

By Chris