Supermarket Finds (and Mysteries) in Singapore

Hello Singapore! My husband and I have just moved here and I have been settling in by finding my closest grocery store. Today I snapped some photos of things I found there. Some of them are exciting finds, others are mysteries to me. (Please chime in if you know what to do with any of them.)

How small are these limes?! (Fingers shown for context; heehee.) Wow, the large ones are not that big and the small ones are tiny! They would make cute garnishes, but could they really be used for juicing?