Clag was first trademarked in 1898 by Joseph Angus, manufacturer of North Fitzroy, Melbourne. The original paste is thought to have been starch-based. Clag glue was sold in these containers from the early 1900's to the mid 1900's.These items are examples of glass containers used in the early to mid 20th century. Clag glue is an Australian made product still in use today.Two glass Clag bottles . Both are cone shaped and appear to have been sealed with a cork. 2373.1 is a smaller brown glass bottle. 2373.2 is a larger clear glass bottle.2373.1- on base Angus & C0 above ISM Pty Ltd with CLAG on side and numbers 12732 vertically. 2373.2 -on front CONTENTS MADE BY ANGUS & Co PTY Ltd on base - CONTENTS MADE BY ANGUS co PTY ltdjar bottle glue container angus&co clag