This is from the NHS website
Solid foods and milk
You?ll find that as your baby eats more solid foods, the amount of milk they want will start to decrease.
Once your baby is eating plenty of solids several times a day, you may find that they take less milk at each feed or even drop a milk feed altogether. You can continue to breastfeed or you can give your baby between 500ml and 600ml (about a pint) of infant formula a day until they?re at least a year old. Breastfeeding will continue to benefit you and your baby for as long as you choose to carry on.
Beakers and cups
If you?re bottle feeding, it?s a good idea to introduce a cup rather than a bottle from about six months onwards. By the time your baby is one, they should have stopped using bottles with teats. Otherwise, they may find it hard to break the habit of comfort sucking on a bottle.
Using an open cup or a free-flow cup without a valve will help your baby learn to sip rather than suck, which is better for their teeth. Comfort sucking on sweetened drinks is the biggest cause of painful tooth decay in young children. If you use a bottle or trainer cup, don't put anything in it other than formula, breast milk or water.
Choosing a beaker or cup
It?s important to choose the right kind of beaker or cup. A beaker with a free-flow lid (without a non-spill valve) is better than a bottle or beaker with a teat. Drinks flow very slowly through a teat, which means that children spend lot of time with the teat in their mouth. This can delay speech development and damage teeth, especially if they're drinking a sweetened drink. As soon as your child is ready, encourage them to move from a lidded beaker to drinking from a cup.