One ingredient that instantly upgrades any drink?

I swear sometimes it’s the smallest touch that makes a drink feel elevated. A squeeze of fresh citrus, a good rim salt or in my case switching to clear ice(not techinically an ingredient but oh well). It’s one of those details you don’t think about until you notice the difference. I make the blackberry margarita on my bartesian all the time already a great drink but it always felt like it was missing that final polish. Then I tried clear ice and it completely changed everything. The drink looked stunning, stayed colder longer and somehow just tasted cleaner.

It’s such a tiny tweak but it made my whole experience smoother. What about you what’s one small upgrade that made your drinks just amazing?