ALL Loctite items are packed in oversize bottles to allow for expansion.
For instance if a 50ML bottle was filled it would be 110ml. If they were filled to the top the product would become solid and couldn't be used.
The anaerobic bottles are specially formulated oxygen-permeable polyethylene bottles that allow air to pass through the wall of the bottle to maintain stability of the liquid product inside the container.
The bottle is also not filled to the top for stability purposes.
A 50 ml bottle does indeed contain 50 ml's of product in a larger bottle.
A 10 ml bottle does indeed contain 10 ml's of product in a larger bottle.
A 250 ml bottle does indeed contain 250 ml's of product in a larger bottle.