If you have the PC version of it, you can use console (~ button)
With console
Type in: showenchantment
Then, choose the ring and then a sould gem (if you have Azura's Star that works too) but it have to have a soul in it!
Finally, name your ring
It costs money so be sure you have some!
Please Note: You can only choose a non-enchanted ring to enchant!
Then, scroll down the enchantemnt options to invisibility option
You must already have a invisibility spell in your spell inventory!!! (with console and without)
If it is for use, I suggest you choose your weakest sould gem since it wont affect anything, only its sell value. If its to sell it, the bigger the soul gem, the bigger the value.
Without console
If you have other versions such as PPS or Xbox 360, you need to find an Altar of Enchantement either in the Chironasium at Arcane University or in Arch Mage Quarters. You need to be in Mages Guild in order to access the Altar and must have access to Arcane University and be an apprentice (for Chironasium) or an Arch Mage (for Arch Mage querters, for this you need to finish whole quest).
Again the procedures are the same
Name
Ring choice
enchantment choice
soul gem choice
you cant, but you can make armor with grand soul gems and chameleon effect to get 100% chamelion
They are frequently found in random loot. Or you can make one yourself if you are good at alchemy.
30 second invisibility
You have to use the potion of invisibility.
use the night visio potion with the water botle and there you go.
If you are a vampire, a blood potion replaces the need for a feeding.
Invisibility Potions and Fortify Health Potions
No. But there is an invisibility potion, if that's what you are asking. It requires a potion of night vision ( water bottle + nether wart+ golden carrot) and a fermented spider eye to brew.
Have mandrake root elves cup cap
It is already enchanted so you can't do anything to it.
You're going to have to come up with your own originalideas -- that's the meaning of the word! Most potions don't have fancy or odd names, though -- they're just called "love potion" or "invisibility potion."
It lets you carry more than your usual weight capacity.
You have to buy the Invisibility Potion, It's at the Rock Ridge,it's being sold at R.Jearls.
I don't think it's possible to make a potion with he same effects as any type of alcohol.