Short verdict

Buy in Korea. Best purchased during a Korea trip, usually because of local access, price, testing, or limited bundles.

CU, GS25, and 7-Eleven Korea are great for sampling, but many items do not travel well.

What to know

Buy snacks and drinks to try during the trip, especially seasonal or small sealed items.

What to avoid

Skip refrigerated foods, crushable bakery items, and large multipacks unless you will eat them before flying home.

Final verdict: taste locally, pack selectively.