diff --git a/go/water-bottles.go b/go/water-bottles.go
new file mode 100644
index 0000000..503078e
--- /dev/null
+++ b/go/water-bottles.go
@@ -0,0 +1,16 @@
+package main
+
+func numWaterBottles(numBottles int, numExchange int) int {
+	drank := 0
+
+	for numBottles >= numExchange {
+		canGet := numBottles / numExchange
+
+		drank += canGet * numExchange
+		numBottles -= canGet * numExchange
+
+		numBottles += canGet
+	}
+
+	return drank + numBottles
+}