In the height of summer in Spain, when the gig is on the third floor and all ones gear is humped up stairs, I am afraid to say the first two beers barely touch the sides, but drink driving for me is a no no and that's why after 32 years I hate doing gigs, hanging around all night drinking coke and lemonade, watching the bridal/birthday/anniversary/holiday makers get drunk, thank god for the ten minute get in and the occasional designated driver.
I love the beer umbrella idea, just another $49.99 for that I guess.
Kev