Antique green glass soft drink bottle, from the 1910s made in Sydney Australia.

The bottle is stamped:
on the front - TADS SYDNEY, Trademark Registered
on the back - Please Return When Empty
on the base - RB 8

This bottle has an unusual internal thread which is what I understand the registered trademark refers to.

Made in Australia in the 1910s.

This bottle is in good condition. It is a little cloudy in places. There is a lip chip (see photos) and a chip on the body to the left of the letter T in Tads.
Still a good looking bottle in a nice shade of green. Price reflects these issues.
Research shows one with slightly less damage sold for $125 at auction in 2017 in Australia for $125.

Bottle is 26cm tall x 8cm across the base. Bottle weights approx. 1kg.

Measurements are approximate.