We stopped with sterilizing at around 8/5-9mths and just used to give them a good wash in hot soapy water.
I thought it was pointless to continue to sterilise bottles when was advise we could stop sterilising weaning paltes/spoons @ 6mths. Plus RC loved to pick bits up off the floor and anywhere else and put them in her mouth.
Now she has 3 beakers, 1 milk breakfast, 1 juice/water through the day and 1 beaker for bed. these get washed with her eating things as normal in the sink