How can I get my husband to stop spending so much money on consumable items while at work?

Okay so my husband and I have been married for almost 2 years and have a 16 month son. I am currently self employed and make about half of what my husband is making. We are in the process of closing on a house within the next month and have never (at least since being married) had both our incomes going into the same bank account. Well I just looked at his bank statement and he has spent over $200 in the last 10 days just in food and drinks while he is at work. I keep trying to get him to take his lunch so he won't have to spend so much but even when he does bring a lunch, he still manages to spend $10+ a day on drinks and such. He still thinks we should split EVERY bill in half which I think is ridiculous considering he makes twice as much as I do and I pay for my fair share of everything but I'm tired of feeling like his roommate rather than his wife. Then anytime I ask him to pay for anything, whether it is groceries, clothes (did I mention he has NEVER bought diapers for our son?) and just anything in general, he never has any money left. I am getting so tired of living paycheck to paycheck when we make plenty and if he would stop spending so much, we would be able to start an emergency fund. When we do move into our house, I have told him the money is going to a joint account so that I can budget where all the money is going and to moniter his spending on such stupid things. He gets upset because he says he is the one working to make that money so he should be able to spend it on whatever he wants. I don't know what to do to get him to realize it is ridiculous to spend so much money on things we already have at home. I have told him that once we get moved, that we will have a specified amount to spend on anything we want but if that is gone, too bad. We make enough money to get by but it makes things extremely tight with him spending so carelessly, I would much rather spend it on a family outing or get our emergency fund started. Any ideas on how I can get my husband to stop spending so much on consumable items and realize money in the bank is more important?