I recommend the FilliMilli piece sponge.

I found it a hassle to wash, dry, and reuse sponges after applying makeup, so I looked for a good disposable sponge and spotted this product at Olive Young. When I tried it out, I liked that the material was soft and flexible, allowing it to adhere more tightly to my skin during base makeup compared to my previous sponges. And best of all, since it comes in a large size, I didn't feel bad about throwing it away after just one use.