Baby bottles tend to pile up when you're so busy taking care of your child to clean them, but instead of running them through the dishwasher and waiting or scrubbing them by hand, pop them in your pressure cooker on the steaming rack. A few minutes later, they will all be clean and ready for use. Image from e29616.
Anjali Prasertong explains how it's done, and how well sterilised they come out when they're finished:
The instructions for my pressure cooker (a Kuhn Rikon Duromatic) had me place the washed parts on the cooker's steaming rack, add a cup of water, bring the pot up to full pressure, and immediately turn off the heat. The process was fast and, except for the few minutes while the contents were coming up to pressure, could be stopped and resumed as needed. It became the only way I sterilized pacifiers, bottles, nipples, and pump parts for the duration of my son's infancy.
If you don't already own a pressure cooker, it's already a good investment -- this just makes it a better one.