Vegas truly has everything. A Hawaiian store right on the strip with all your necessities...ALCOHOL and WATER! very reasonably priced. 24 oz bud is less than $3 and 1L water is $1!! They sell 12 packers too. Lots of Hawaii souvenirs and vegas stuff too. They close at 2am.
This location is right across the street from Monte Carlo which was very convenient for us. There's 2 other ones inside the plant hollywood mall. Just stick your head in grab some beer and continue with the strip!