Mr. Q. Cumber soda when I had lunch at Keenwah last week. It was pricey -- two bucks for seven ounces -- but it was also delicious.
My friend took a sip and said "We could make that." We discussed things like using a juicer and simple syrup. When I got home it occurred to me that I could try making a cucumber shrub. I added one peeled, diced cucumber to 2 cups of distilled white vinegar, then proceeded according to the recipe found here.
It came out great. Like summer in a glass. YUM!
P.S. I just found out that cucumber beverages are trendy. Of course they are. I'm hip like that.