If it's just a few things, isn't there a store at the resort? It wouldn't pay to just pick up a few things to take a taxi. I've never stayed at Pop, but all the resorts I have stayed at had some (yes, overpriced) items available.
If you need a large order, you can save time and the hassle by using Garden Grocer.
Sorry I couldn't help more!
Oh, and maybe bring on some non-perishable things in your bag. Or, I have shipped a box to some resorts before with breakfast items - maybe $20 or so to ship. Saved time while I was there!