If u are on a tight budget,best just put boiling water in container and soak for 5mins. It does the same thing. But if u want to invest,i think any brand should do the trick. Im a fan of tommee tippee so maybe see that.
This list might be helpful for you, sis: https://sg.theasianparent.com/the-best-sterilisers-in-the-market-shopping-guide-special
Thank you mommy
Anish Vanessa