I used to share one tiny bathroom with two roommates, and I was fully grossed out by how close my toothbrush was to the toilet, shower, and other people’s brushes.
Traveling was another factor that played into my toothbrush concern. I’ve tried basic toothbrush traveling cases, but they’d quickly get moldy from all the locked-in moisture — so, I gave up on them for good.
If using a new toothbrush every day was sustainable, trust me, I would. But instead, I’ve stocked up on UV toothbrush sanitizers — both portable and home-friendly — that keep my toothbrush clean and keep me happy.