It's not adviseable to add any food, fruit, rusks etc to baby's bottle. I would speak to your health visitor but milkshakes/smoothies aren't really for little babies.
um why not?! its milk and fruit!! which bit of that is not allowed?!
Because there's risk of choking for a start. If you wish you give your child fruit and milk then it would be best to mash the fruit with some milk and maybe add a bit of rice or porridge and feed from a spoon when baby is weaning but definitely not supposed to give babies food mashed with milk from a bottle or cup. When they're big enough, over 1 probably a straw would be good. It would clog up the hole in a feeding cup or bottle anyway.
Some babies aren't as keen on milk from a cup or bottle especially if they are used to breastfeeding but if you persist then they will do it eventually. I wouldn't advise trying too many cups and bottles as this will confuse baby even more. Stick with one particular cup or bottle and keep offering it to them....it can take a little while but they will take it eventually. I have breastfed 4 children and have had all these probs before, most of the time it's just a matter of being persistant and consistant too. I'm also a trained breastmates peer support so if you need any further advice on switching from breast to bottle/cup then don't hesitate to ask xxxxxxx