Sippy cup question!

PATRICIA

So this is my 2nd baby... but i forgot what type of sippy cup i used with my first. My 2nd son is now 7 months old. Eating solids (but not finger foods yet) and i dont know the best sippy cup to use and if i should put formula in it or just water. I remember giving my 1st born a hard spout and miracle 360 but thats when he was older than 7 months.. i forgooot what i have done before! Lol. Help me plsssss....thank you