Does Kirkland sport drink contains caffeine?

Yes. The ingredients in their usual bottle of sugary rubbish is:

TAURINE, CAFFEINE (32MG/100ML), GUARANA, B VITAMINS (FOR ENERGY RELEASE)

FRUIT JUICE FROM CONCENTRATE (10%): TROPICAL AND RED BERRY FLAVOURS ONLY.

There are a lot better ways of upping your overall energy levels and also getting a boos needed for instant performance.