This is a little shower lock I designed for a custom made shower.

PSA:

• Only use it if you still have brain cells remaining to check if it's engaged before pulling/pushing like a damned animal on the door
• Only use it if you have an emergency device inside of the shower in case you fall
• Only use it on thick glass, mine is chemically tempered so it doesn't have the weak point in it's corners
• Use common sense