Does anyone have tips on making a homemade bobber for fishing?

I’m looking to make my own bobber for fishing and was wondering if anyone has any helpful tips or advice on how to do so. I’ve been trying to find ways to customize my fishing gear and thought making a bobber would be a fun project. Are there any specific materials I should consider using? Any techniques that work best for crafting a durable and effective homemade bobber? I appreciate any insights or personal experiences you can share. Thank you in advance!