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Old 20th Jul 2021, 8:05 pm   #11
Paul_RK's Avatar
Join Date: Nov 2003
Location: Fakenham, Norfolk, UK.
Posts: 3,278
Default Re: Rosin flux needle bottle users

I see it has ribbing too, so perhaps its form is a survival of a long-established convention for substances "not to be taken" to come in flattened bottles with tactile surfaces easily recognised in dim light and by blind folk once they knew the implied warning. I've picked up several 1920s/30s glass examples at a nearby bottle dump: Jeyes Fluid, Sanizal etc..

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