Liquid Lab Flask

The opening is just wide enough for my toddler to pour in rice without spilling, and the glass feels sturdy enough to survive a few drops. This replacement flask fit perfectly and has already sparked lots of pretend chemistry experiments.

My four-year-old loves pouring water back and forth between the measuring cups, and the flask's wide mouth makes it easy for her little hands to fill without spilling everywhere. It's held up well to daily use and fits perfectly with the other lab pieces we already have.

I was pleasantly surprised by how well the ground glass joint fits—no wobble at all. The 250ml markings are etched clearly, making measuring easy. Great for small batch distillations.

The glass is thick enough to survive my clumsy lab bench setup, and the markings are etched on so they won't fade. Boiling water goes in and out without any fogging or cracking issues.

I needed a flask that could handle both mixing and measuring, and the graduated markings on this one are clear and accurate down to the milliliter. The borosilicate glass feels sturdy in my hand, and it’s held up fine to hot liquids so far.

The pour spout is perfectly tapered—no dripping at all when I transfer liquids. It holds exactly 250ml to the fill line, which made my last experiment much cleaner.

The borosilicate glass is noticeably thicker than my old lab flasks, so I’m no longer worried about cracking it during heating and cooling. Handles a Bunsen burner flame evenly without any warping, even on the thinner neck.

The rubber stopper fits so snugly in the neck that I can shake the flask without a single drop leaking. It’s already replaced my old beaker for mixing small batches of solution.

My old flasks kept cracking, but this one’s borosilicate glass has handled boiling liquids and quick cool-downs without any issue. The pour spout is also perfectly shaped—no drips down the side when I transfer.

I was pleasantly surprised by how thick the glass walls are—this thing can handle rapid temperature changes without cracking. The 1000ml capacity is perfect for larger batches, and the measurement markings are etched cleanly so they won't fade.