I couldn't figure out what this "melon" was. When I bought it, I was looking for gourd-like vegetables to create a vegetable pot pie, but cutting this open made it apparent that it was some type of melon. This website called it a small striped melon. One of my friends from the Philippines said "It is a melon in the Philippines we use to remove the seeds scoop the flesh and put condense milk and ice."
It wasn't sweet, and tasted more like a cucumber to us.