You probably should sterilize all bottles until your child is off of the bootle. You don't need to everytime especially if the only have juice or other drinks like that. Just wash the bottle as if it was a cup or glass that you were drinking out of. At 1 year a child should have a fully developed immune system so shouldn't be a problem
Most mothers get tired of all that work at about 6 months of age,
which is also the time that sweetie-pie starts putting everything in his/her mouth.
A baby's bottles should be sterilized until the baby has stopped using them.
The average age for babies to wean from their bottles, is between the ages of 2 and a half and 3. Age 4 the latest.
Here's a good article on sterilizing baby bottles (and why it's not always necessary): http://parenting.ivillage.com/baby/bnutrition/0,,b11b,00.html
by cleaning them
You can wean your baby take from her bottle by sticking her nose in a dish of milk. The milk will get on her tongue and she will begin to lap.
Most pediatricians recommend that you wean your baby from a bottle around 12-18 months.
No. This is too early to wean a calf. If it's on the bottle, it should be weaned at around 3 to 4 months of age.
You should not wean wild kits (baby rabbits) because they are wild. They will naturally wean themselves.
You can start to wean rabbits at 6 weeks of age. By 8 weeks of age they should be completely weaned.
You can wean a baby cockatiel when they are at least eight to nine weeks of age.
Why are we advised not to wean a baby before they are 17 weeks old?
At 4 to 6 weeks they should start to eat solid food and drink water.
Dwarf rabbits are like all pet rabbits in most ways, including when they can safely wean. Rabbits begin to wean around 4 weeks of age. By 6 weeks of age, they should be fully weaned. By 7 weeks of age, the rabbits are ready to be separated from their mother.
It's different for every animal, but typically, babies do wean themselves. I have animals and though most wean themselves, sometimes you have to separate the baby from the mother for a period of time and then you can put the baby back in. At least it's easy to do that with guinea pigs...