Yep we have that mix down here. They also sell iced tea flavored vodka that tastes pretty amazing mixed with lemonade. I'm pretty sure none of them are clear though so sneaking it in bottles wouldn't work.
Yum, I might try and get some of that ice-tea flavoured vodka in this year. I've always been so paranoid that last year was the first one I tried to sneak stuff in and it was so easy! I'm going full-throttle this year. Booze in the bra, vodka water bottles and hidden compartments for the win!
Last year a friend of ours brought in a big picnic lunch that didn't get checked too thoroughly. She had a couple bottle of olives that had been marinating in vodka for a month. Just one of those things got you tipsy!
For some reason that reminds me of a Turbo Shandy. A normal shandy is a British drink that consists of half beer and half lemonade ("lemonade" refers to Sprite/7up in the UK) and is what the youth normally drink before they're allowed to have beer on its own. They sound awful but are actually not too bad on a hot day. The main difference in the turbo variety is you use Smirnoff Ice rather than Sprite. I suppose you could also use Mike's Hard. The particularly adventurous might add a shot of vodka to the mix. You can imagine the effects this drink has.