Review on Convenient Plastic Squeeze Bottles with Stainless Applicators for Precision Application by Eduardo Reyes

Overall I'm impressed with these bottles. The plastic isn't too thick, but now it's too thin. The needles are screwed into black caps, which are then screwed onto the bottles themselves. This is nice so you can buy shorter or longer needles in the future. I put some Kano Kroil in a 1 ounce bottle and held it upside down and nothing leaked through the red cap on the end of the needle. I didn't squeeze the bottle too hard when holding it upside down, but I squeezed it a little and nothing came out. The red caps fit snugly around the needles. I expect these little end caps will loosen or get lost over time due to their small size. But so far they're working great. I've only been using them for about a week so time will tell how they hold up.