Soda addiction?

How will I convince my husband to stop his soda addiction? I feel like I already said it all but nothing is working. My daughter is only 8-months old and I dont want her to not have a daddy so early if he wont stop this. he's overweight like around 360lbs as of the moment. I feel sad and disappointed. Diet coke, regular coke, flavored.. it doesnt matter.. the 24 cans can only last for 2 days, 3 days tops. 
Please no negative comments, I am already not feeling good as of the moment. 

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