I still drink out of sippy cups.
I even keep a sippy cup in my car and when driving I will drink milk, juice etc out of my sippy cup.
I also sometimes drink out of a baby bottle when driving down the road where nobody can see me.
I've even driven down some dirt roads while wearing just a diaper and my shirt and shoes which also felt awesome.
I love having milk in my sippy cup or some juice and sometimes prefer a bottle and sitting around or laying in bed or in my crib wearing just a diaper.
I've even fallen asleep with a baby bottle in my mouth drinking some milk.