You can buy some Coronitas, 7 oz Corona in bottles. I use them as samplers. They are clear and lets me see the beer as well. I keep them in a box to keep the light out. Soak them is Starsan for a couple of days and the labels scrub right off. Of course, you need to find someone to drink the Corona...
Bottled: Mexican Cerveza, Irish Stout, some Blue Moon clone, Pepper Ale, Full Hard Lemonade, Russian Imperial Stout, My first attempt at Mead (JAOM), Black Pearl Porter
Kegged: Blue Moon clone, Irish Red Ale
On Deck: Citra Hop Bomb (small batch) and Cream of Three Crops
Never underestimate the power of stupid people in large groups.