Majority of these worked fine to suck up fluids up clear into the bulb of the stick, while a few barely got even a quarter of the stick full, no matter how you squished the bulb. I would say there is probably a 1% flaw ration to the package that you would recieve. Otherwise, you can see contents within perfectly fine, it holds the contents fine, works great with oils, water, and even resin. I used these on pigmented resin to fill in fine spots in some wood work I did, and these did a beautiful jSee full review