b"Sinkhole (Karst Cooler)2 oz Gin2 T Fresh Lime Juice8 thinly sliced Persian Cucumbers1 T Simple SyrupI T Chopped MintTonic or Soda WaterLime and Mint GarnishIn a cocktail shaker combine gin, lime juice, cucumber, simple syrup, mint and a couple scoops of ice.Shake like your life depends on it - shaker should be almost to cold to handle.Strain loosely into large drinking vat, top with soda and garnish with mint and lime wedges. Pour into your solution channel. This is just as tasty in a non-alcoholic version and a good way to get a few greens into your youngsters - just substitute lemonade or iced tea for the gin and lime juice and use club soda, not tonic.Trust us, this is the only kind of sinkhole you want to be involved with.However, if you do have a close encounter with the bad kind, don't reach for a cocktail (yet), call an F&R geotechnical engineer."