Tapered cork that seals smaller mouth glass bottles, for example: Pop Shop Bottles

Easily fastened and removed  by hand. Can be drilled to desired size with any drill. 

Convenient way to seal small bottles and keep contents fresh.

Size (mm): 26 x 20 x 16

Size (in): 1 x 3/4 x 5/8

Search more sizes here. 

Purchase Rubber Bung style with or without pre-drilled hole here.