Othmro Plastic Lab Chemical Reagent Bottle, 250ml Wide Mouth Sample Sealing Liquid/Solid Storage Bottles, Black 1pcs

Using these to store pH calibration solutions. (pH 4,7& 9)One full bottle got knocked over on to its side and I didn’t notice for a week.They seal well as I had no loss of contents.As an experiment I filled one with water and stood it upside down on a sheet of paper.So far No leaksThese are a robust leakproof and lightproof storage bottle and suitable for my use

TSA 100ml bottles that don't disintegrate when cleaned. They work fine.

I needed smaller opaque bottles to store custom blends of UV resin for 3D printing. I was shocked to see how much most of the available ones cost, some as much as the cost of the resin I needed to store. These seemed to be the best value for the number and size I needed. I think they will be fine. I would suggest not throwing away the empties, they could be useful later.

I use these for calibration solution for my pH meter.No leaks.Caps are tamper proof caps, meaning they like soda bottle caps. First time they're opened you're gonna have to break the plastic ring. Nice feature to have, but not something I need.

Have to take measured doses of a liquid medication. Perfect to carry premeasured doses to add to beverages during daily routine.

These bottles are single use junk bottles that will not seal at all. I just needed some clear 1000ml bottles seal-able reusable bottles for liquids. These ate opaque and once you use the caps they lock on permanently like a 2ltr bottle. I am just going out and getting me some 1ltr pops!