Pediasure has a new powder mix. You mix it into regular milk or into smoothies, whatever you want really.
Anyways over on slickdeals I found the website has a mail in rebate for up to 15.99 for a canister of 10 servings.
rebate for pediasure powder mix, free after mail in rebate
I've heard horror stories of how bad actual formula taste and I couldn't stand pediasure when it was given to me in a hospital setting when I was about 6-7, back then it was still in a metal can though.