No, fry are much too sensitive to be stuck in a bowl without filtration and heat. You need a bare bottom tank with a sponge filter and heater.
Also, the number of fry and type of fish will determine the size of tank that you need.
What type of fish are you intending to breed? I hope you're not breeding IN the 2.5 gal because this is MUCH too small for more than one single fish.
Hope that helps...