Glass Florence Boiling Flasks

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

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

Our heavy duty Florence (boiling) flasks are made from heat resistant borosilicate glass (Pyrex) for lab use but look great as floor or hanging terrariums.

Markings are limited so they can also be used for packaging or for display in store windows or at trade shows.

What is a Florence Flask used for?

Florence flasks have thicker walls than other flasks and make them suitable for vigorous boiling; hence their alternate name "boiling flask".

Florence flasks can be used interchangeably with Erlenmeyer flasks if all you want is a decanter for wine or juices.

They also make attractive terrariums, especially the larger sizes.

Displaying 1 to 11 (of 11 products)
250ml Florence Boiling Flask

250ml Florence Boiling Flask

SKU: 55242
6 250ml Boiling Flasks/Corks

6 250ml Boiling Flasks/Corks

SKU: 55242-CS
6 250ml Boiling Flasks/Bungs

6 250ml Boiling Flasks/Bungs

SKU: 55242-RS
500ml Florence Boiling Flask

500ml Florence Boiling Flask

SKU: 55243
6 500ml Boiling Flasks/Corks

6 500ml Boiling Flasks/Corks

SKU: 55243-CS
6 500ml Boiling Flasks/Bungs

6 500ml Boiling Flasks/Bungs

SKU: 55243-RS
1000ml Florence Boiling Flask

1000ml Florence Boiling Flask

SKU: 55244
6 1000ml Boiling Flasks/Corks

6 1000ml Boiling Flasks/Corks

SKU: 55244-CS
6 1000ml Boiling Flasks/Bungs

6 1000ml Boiling Flasks/Bungs

SKU: 55244-RS
Boiling Flask-Long Forceps

Boiling Flask-Long Forceps

SKU: 55244RB-Terr
$24.95USD Each
Boiling Flask Flower Vase

Boiling Flask Flower Vase

SKU: 55244RB-Ring
$17.95USD Each
More Information

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.

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

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.