Hoppers are pretty cool looking and easy to buy. Shove in the freezer, and they just go to sleep
You could practice in whatever. Bottletops is probably good for the first go, practice setting and getting the bubbles out. And then work out how to block off the bottom after you've sorted that. Anything round you can find!
Sealant on the wearable will just wear off over time. But it could make it shinier? I don't really know that part, never used it.