Build the vodka and lemonade in a large pint glass filled with ice and top with a dash of crème de menthe. Garnish with an edible orchid or other edible flower.
If edible flowers are not available, garnish this drink with fresh mint and lemon piece. I did a series of summer drinks for Absolut Vodka garnished with edible flowers. This is one example. For information on edible flowers, see Lucinda Hutson's book Herb Garden Cookbook (1998).