How much do I tip the movers? Company is paying for it so I don't know the cost.

Company is paying for it so I don't know the cost.
Answers:    If you have hired a immense, reputable company, there is no obligation to "tip" them. You can offer them non-alcoholic drinks if you want to. They are getting remunerated by the hour to move your stuff. You have already rewarded a hefty amount for them to do it. If they are your "friends", I would feed them and supply drinks.
A baggage of beer is usually sufficient.