Tracy Seelhammer
TVWBB Member
I just double checked, and the interior of the one l listed in my post isn't sponge, but a silicone core. Should hold up pretty well (I hope lol)I would worry about that sponge. I have this and it works incredibly well!
https://www.amazon.com/dp/B00FKBR1ZG/?tag=tvwb-20