Glass Plug by VGoodiEZ
Well, it's small, round and fits in a hole. It's extremely restrictive, infact it blocks the air flow completely.🤷
Seems to be easy enough to remove, leaving you with a hole perfect for not retaining anything any time you need.
It also appears to reusable, I have plugged and unplugged my hole with this product many times and thare appears to no ware on the product.
Pretty simple to use, it has 2 ends, a big one and a small one. If the big one doesn't fit, try flipping it over and trying the other end.💁
Vgoodiez is the best.