buying HDPE drop bottles

Hello, I have purchased this item:

www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=380618008709

I have noticed the drops are small and when I measure a three drop dosis in 10 ml. with a chlorine dioxide test strip, I read 100 ppm.

I have another drop bottle I purchased some time ago and the size of the drops are greater, I can read 250 ppm when I measure the dosis with this bottle.

Can you recommend me a good site to purchase quality HDPE drop bottles with a correct drop size?

I purchase all my bottles from
www.containerandpackaging.com

I purchased the following items:
B351
L517C
L524

That's the bottle, tip and cap.