-Go to the grocery store and buy a jug of cranberry juice (the normal sized jugs.. i think its 64oz)
-put it in the fridge.
-when its chilled finally, drink about 1/4 of it.
-fill the emptiness with your tequila bout 1-1.5inch from the top.
-put top on and shake it up killa.
-drink out of the jug.

now you are set for the night. make sure you carry this jumbo big-kid drink box around all night

(this also works well with cran-apple juice if you want more sweet and tartness)