A frosty glass of refreshing iced tea is the inspiration for this sorbet. Iced tea flavored with peaches has nearly outpaced tea with lemon in recent years. Bottles of tasty peach tea are available in most stores, but you can also brew your own with peach tea bags. If you use bottled tea in this recipe, make sure it isn't diet. This sorbet is a good way to use peaches so dead-ripe that they cannot be eaten whole or sliced because any small brown soft spots disappear into the tea. The vodka improves the texture of the sorbet, as does the corn syrup. Use tea-flavored vodka if you have it, although plain vodka works fine. Pouring a splash of the sweet tea vodka or bourbon over the soft sorbet makes an excellent slushy for grown-ups.