It sounds like the remnants of the stomach bug. Both my kids were big pukers and we made the mistake several times of giving them more food than their stomachs could handle after vomiting. Our pediatrician strongly recommended not giving them ANYTHING after vomiting for 4 hours, even if they seem hungry and thirsty. After 4 hours, he suggested 2 oz of pedialite or water at a time, every 30 minutes but no food or milk for a FULL DAY after vomiting. I know it sounds counter-intuitive and if your kid is hungry or thirsty, you want to give them as much as they want. But, from NOT following our pediatricians instructions, we ended up in the ER twice for severe dehydration and it was awful. Because that full cup of water or milk would re-ignite the stomach bug, make them puke the whole thing up, and then they couldn't hold anything down, which led to dehydration. So I recommend taking it easy, don't feed him food or milk for a day. Just 2 oz of fluids every 15 minutes all day. You can give him popsicles if that makes you feel better. The next day, don't let him drink a full glass of water or milk, take it slow. If he still drinks from a bottle, you can mix water and milk. A small bowl of cheerios or dry toast. A bananna, with small cups of water or juice throughout the day. If he's able to manage that on day two, the NEXT day, go ahead and let him eat and drink whatever he wants. I know it's hard but if you stick to this, he will get better quicker and next time you'll know what to do!