Self-contained, one-handed unit allows for full mobility and automatic refilling of syringes without returning to the bottle or use of a hose. Fast fit bottle attachments protect the bottle. Bottles can be easily removed and replaced. Fully adjustable barrel allows for accurate dosing dependent on the medication, in .25 mL increments. Packaged with a 100 mL and 250 mL Fast Fit bottle attachments, three bottle collars (20mm, 30mm, & 33mm) and metal Luer lock needle nut.