10ml or 20ml or 30ml vials

I've been using these for a good while now. Not filtered but they get the job done and are cheap. Twist on luer lock, load syringe (loads fast), unscrew syringe, put needle on of your choice, jab, done. A couple times I have reused an old one on a new vial after a alcohol bath, but that's just me.

https://www.amazon.com/dp/B0CQTVDYR4?ref=ppx_yo2ov_dt_b_fed_asin_title
 
Another angle of these blue ones, BigDeee posted an amazon link, thanks!
I was finding difficult to find only one place selling needles and this spike, and most of those med suppplies are charging some expensive shipping sometimes.

Edit: I did not have any issues getting till the last drop.
This one has zero filter tho
 
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