Electric steam sterilisers are the most common choice: fast (usually under 10 minutes), effective, and don’t need chemicals, though they take up permanent counter space and need occasional descaling in hard water areas.
Cold water (solution) sterilising is cheap to buy into and portable, but requires you to keep buying sterilising tablets or solution, and items need to soak for a set time rather than being ready in minutes.
Tommee Tippee Closer to Nature Electric Steriliser - White
£74.99
UV sterilisers are compact and chemical-free, and some double as dryers, but tend to cost more upfront and hold fewer items per cycle than a steam steriliser.
Whichever you choose, check how many bottles it holds in one cycle against how many you’ll actually be using per day — undersized capacity is the most common regret.