Ground-in Pipette Dropping Bottles

A dropping bottle keeps a reagent and its dispenser together as one unit. The pipette is ground into a matching joint in the bottle's neck, with a rubber bulb on top, so the user simply lifts out the pipette, squeezes and dispenses a few drops, then returns it — no separate dropper to find or cross-contaminate.

It is the classic vessel for indicators, stains and drop reagents used constantly at the bench, where having the reagent ready to dispense by the drop saves time and avoids mix-ups.

Dispensing indicators and titration indicators, stains for microscopy, drop reagents, and clinical, diagnostic and QC bench reagents, plus teaching labs and field test kits. Amber versions protect light-sensitive indicators and stains.

A small borosilicate or soda-lime bottle with a ground-glass joint matched to a ground-in glass pipette topped by a rubber bulb. The pipette and bottle are a matched pair. Amber glass protects light-sensitive reagents; a marking spot allows labeling.

Keep each pipette with its own bottle, as the ground joint is matched, and dedicate a bottle to one reagent to avoid cross-contamination. Confirm the rubber bulb is compatible with the reagent — some solvents and strong reagents degrade latex. Use amber for light-sensitive indicators and stains.

The bottle and pipette are formed, and the neck joint and pipette are precision-ground to a matched fit, then annealed. The rubber bulb is fitted. Amber comes from batch chemistry. Joint fit and pipette matching are the key checks.