Same ultimate solution, but no need for any apparatus - lung packing. I learned this incidentally while I was into freediving as a teen. Just take the deepest

Same ultimate solution, but no need for any apparatus - lung packing. I learned this incidentally while I was into freediving as a teen. Just take the deepest breath that you can, and then use your tongue and throat to pack more air into your lungs until you feel fit to burst - it may take 20-30 packs. Hold it for ten seconds, then slowly exhale - if you’ve done it right you’ll feel like a deflating air mattress. Hiccups will be gone. If they aren’t, you didn’t pack enough.