Afraid of a "Dad throws a chair across the room" fight over 20 oz pop bottle

Background:

As   I have mentioned previously, my Dad doesn't like me or my sister who doesn't live with us, drinking pop to often.    I go to a volunteer job once a week and since I already have had orange juice w/ breakfast.   And the "Sparking" water drinks that originally had been my water drinks (Aka Bubbly) - have turned into non-lunch drinks.  So i need to have something to drink for lunch so I buy: pop, apple juice or chocolate milk,  and the occasionally small milkshake to drink for lunch.    And he and I get along like two goats with horns that are ramming each other.   Like back when  I still used a plastic plate- I had leftovers of my quesadilla filling from the previous Friday or whatever- I put it on like toast or something- and he and I had a huge fight about it to the point he throw a chair across the dinning room-  (https://www.7cups.com/forum/relationships/General_2449/MomhadtotellDadoffabouthisbehaviouragain_380253/)     and there's other problems like "having too much cheese" on a cheese sandwhich,  bullying me on to a scale,  thinking that I can get a lunch for $5 or less  (in 2016) and I should "take a water bottle or buy water" at the mall  and how "mom buys water"  and how he didn't believe me when I told him in 2014 that I hadn't "acted childish" and "been uninvited" to the cast party -and a who host of other problems.   

Story

Today I went to my volunteer job as usually on Wednesday and I'm back around 10:45am.  Dad's sitting at the table reading the newspaper  I get changed and I do my online stuff before going down to lunch at about 11:45am.  He's still sitting at the table still reading the paper and it's been an hour later.  My main problem was that I was afraid he and I would get into another Dad-throws-the-chair- into- the-books-and-stuff-behind-it because I brought up Cola I bought  some weeks ago to have for lunch and "I just ate out last night".    Luckily it didn't happen but with Dad still at the table reading- there was a huge chance there would have been a problem.