helpp please no more formula

sooo yesterday i told my SO our Son needs some more formula ( i would go but hes always gone with the car im ALWAYS home alone with baby ) but anyways soo i have a lil formula left but not enough for a bottle . what can i do til he gets home ? i have some pedialite and baby jars . can i give him pedialite to drink n jars to eat til iget to the store? baby will be 7 months may 1 and i cant go to the store now because hes not home i have no car and i should of added HE BE SMASHING JAR FOOD he loves it