Spilled vodka in a tutorial

Looks like the tutor is not taking things further. It can go another way though if the tutor wants to report you for it. It's just not professional to come to work smelling of booze (cheap or otherwise) or to drink in an office setting. Being in a class or tutorial is no different. You would be disappointed if your tutor arrived to the tutorial stinking of or drinking alcohol when taking the tutorial so pay him/her the same respect.
On a wider note, if you do have a drink issue then please seek proper counselling from Student Wellbeing services.

There’s a chance no one noticed and there’s a chance they noticed but felt it was too awkward to say anything. Why were you drinking vodka during a tutorial?

I woke up feeling tired/run down/fed up and I hadn't drank the night before so I thought I'd earned a vodka hot chocolate to cheer myself up

Poor excuse! You need to visit AA. If my staff arrived at work with vodka in their hot drink they would be suspended."It is not permitted for staff (as opposed to clients/patients) to drink, smell of alcohol, or be under the influence of alcohol, whilst on duty or on Trust premises.

I doubt anything will come of this, which is a shame as it’s the kind of wake-up call that you need.
Remarkable how quickly you went from “I just have a few drinks every evening” to “well yes, of course I take alcohol into a tutorial to ‘reward’ myself”.

I do just have a few drinks in the evening, day drinking is very rare for me, and I didn't drink on Tuesday night so what I drank during yesterday day was only what I would've drank the night before

I don’t know what you want me to say. You were plainly an alcoholic from your behaviour in the previous threads and now things are worse. You can’t keep dodging bullets indefinitely.

I woke up feeling tired/run down/fed up and I hadn't drank the night before so I thought I'd earned a vodka hot chocolate to cheer myself up

Now that you’ve started drinking in the day it will probably start happening more often even if you don’t think it will. You should sort it out before it gets to the point of you drinking all day everyday.

Yeah lets face it, at least some of the people who saw this already suspected you have a drinking problem anyway before you splashed everything with smelly booze No matter how magically you feel you hide anything.
Normal or even kinda heavy drinkers don't feel the need for mugs of near neat vodka at classes, that's extreme dependence, don't BS us about control, that being a one off or somehow making up for another night. This is utter lush drunkard territory.

No one I know irl thinks I have a drinking problem. Obviously I know it's not normal to take vodka to a tutorial but I have 4-6 units of alcohol a day, it's not like I'm drinking entire bottles in one night.

That's an obvious deflection. You are kinda making the classic drunk/ket excuse that because you aren't being directly challenged everything is cool, you'd be amazed how many people DON'T want to engage a drunk and get into it all, you think an average college or uni lecturer is going to want to make that their problem? It's not school anymore, they'll just let you fail and lush out.
I told you not to BS me, I've seen drinking, I've seen heavy drinking, I've seen drinking for ego & habit, feeling a need to take a mug of what? 4-6 shots of vodka to a class because you feel your schedule owes it is messed up. I think my very worst after an ill advised heavy night before work was a single whisky into a coffee in the morning to try and dampen the alcohol conversion, and I'd call even that a worrying habit... you're WAY past that.

OP, I was in a relationship with an alcoholic, and my mother in law was an alcoholic. The negative impact which alcoholics have on those around them is not to be underestimated, but the man impact of problem drinking is on the alcoholic.
From your own descriptions of your behaviour, you have a drinking problem, and you also appear to lack insight into that problem. Accepting that you have a problem is the first step to solving the problem.
I am not a fan of AA, because I think that it's a form of religious cult which replaces one form of dependency with another, and which treats addicts as hopeless characters who can only be saved by God; but it can at least be said that dependency on AA meetings and the idea of a "higher power" may be better than dependency on alcohol.
AA is one route. There are other ways to tackle a drinking problem, and you can obtain advice about these online or from a GP, but you have first to realise that you have a problem and try to deal with it.

Going to AA and saying I have 4-6 units of alcohol a day and it doesn't impact my life whatsoever would seem a bit ridiculous