Phone: (519) 746-4761

Canadian Address:

169 Lexington Court, Unit I

Waterloo, ON, N2J 4R9


US Address:

Niagara Falls, NY 14305

Canadian/International ship from Waterloo; US orders from Buffalo, NY.

For a detailed quote including applicable taxes, proceed to checkout

Glass Florence Boiling Flasks

Florence flasks sizes 100-2000ml; save up to 60% on bulk flask & stopper bundles.

Boil, bottle, decant; custom imprint as flower vases or terrariums for display, gifts, weddings!

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No Glassware Returns

Glassware cannot be returned for any reason; this is for your safety and ours. It would be prohibitively expensive to test for bacteriological, chemical or radiological agents since there is no way to tell if glass has been contaminated just by looking at it. We would have to throw it away even if you claim to never have opened the package.Call first if you are unsure of what you need.

If the item is clearly defective, either heavily bubbled, chipped or with really bad markings, send us an image & we will refund you.

Safety Disclaimer-Warning

Handle glassware with care & wear goggles & gloves because:

  1. Unless you poured it yourself, assume any liquid is hazardous.
  2. Hot & cold glass looks the same & does not have to be red to cause burns. Unless it was in the freezer, assume it is hot.
  3. Borosilicate glass will withstand a fair degree of thermal shock but unless your intent is to see if you can make it crack, don't toss recently heated glass into a cold water bath.
  4. When borosilicate glass breaks, it makes sharp edges like any other kind of glass. Dispose of pieces carefully.


Glassware Specifications in Metric Units.    ~25mm/;  25ml/fl. oz.;  25g/oz.
Volume (ml) Height (mm) Diameter-Neck (mm) Diameter-Widest (mm) Weight (g)
50 95±1 24±1 51±1 45±8
100 105±1 24±1 72±1 70±10
250 140±1.5 34±1 85±1.5 120±15
500 170±2 34±1.5 105±1.5 200±20
1000 200±2.5 40±1.5 131±1.5 260±25
2000 250±2.5 50±1.5 167±2 490±40
5000 340±3 60±1.5 223±2 1000±50
10000 400±4 65±1.5 285±3 1900±200
  • linear coefficient of expansion 20-300C: 32.0+/-1.5 x 10-7
  • annealing point 560C+/-10
  • softening point 820C +/-10
  • density 2.23+/-0.02g/cm3
  • The diameter & height does not include the rim (~3-4mm).
  • The thickness increases from the sides to the bottom.
  • 50 & 100ml available on special order