I am white in a bottle or a box. I am something you can drink or pour on cereal.
Milk
I will keep you dry on a rainy day.
Umbrellas, ponchos
I come in a bottle but I am not water. I am used to clean your hair.
Shampoo
I always come in twos. I get put on your feet, but I am not socks.
Shoes
Rest your head on me and have a good sleep!
Pillows
I am in a tube. I should be squeezed. I keep your teeth clean.
Toothpaste