They are listed in the Glass Study as
A. M. Allan & Co., 1867 - 1907 ?? Forth Glass Works, Firhill, Glasgow, Pressed glass bottles, medical bottles.
Interesting is that this company made moulds...
McGlashen (Stewart) & Son Ltd., 2 Canon Mills Bridge, Edinburgh, Mould makers, Moulds for glass and cutting stones.
Where did you get the info on the thistle mark? Does your bowl have it?