How to safely use rubber pipette filler fill glass and plastic pipettes?

How to safely use rubber pipette filler fill glass and plastic pipettes? Pipette Filler Instructions from Canfortlab

Azlon Rubber Pipette Filler, Universal PWY145

Fisherbrand Rubber Pipette Bulb, Yellow

Pipette Filler Bulb at Thomas Scientific

Lab Instruments Pippet Filler - China Levo Plus Pipette Filler

Pipetting Aids for Graduated & Volumetric Pipettes - Capacity 25ml

Pipette Filler, Labware & Consumables

Dispense Pipet Plastic 3 ml - /en

Pipette Filler - Pipettes and Dispensers - Drifton A/S

2 Pcs Rubber Pipette Filler, 3 Valves Lab Pipette Filler Bulb

Cole-Parmer® Essentials Bulb Pipette Fillers from Cole-Parmer France

Fill any standard size pipet without the risk of cracking or chipping. Fisherbrand™ Safety Bulb Pipet Filler uses an ABS attachment with a silicone

Fisherbrand™ Safety Bulb Pipette Filler, Red

What is the physics behind how a pipette bulb works? - Quora

Rubber/Silicon Rubber Bulb Pipette Filler, For Chemical Laboratory