The below plant is in a garden outside the Ellora caves near Aurangabad, India. It grows a couple feet tall with the flowers about an inch in size. The fleshy stems are a little smaller than a quarter inch.
By chance, same plant found in the Bahamas, New Providence Island, Ardastra Gardens, marked as Pedilanthus tithymaloides. I think @Brenn has this one.
Closest I've been able to get is Euphorbia antisyphilitica, upright segmented pink flower succulent.