Best Round Flasks in 2026
Daisy
Last Updated: Jul 17, 2026
Daisy
Last Updated: Jul 17, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Contains 1 each 50, 150 and 250ml Flask
High quality inert 3.3 borosilicate glass
Heavy Duty Reusable
ASTM Specification E960, Type I requirements
ID/OD: 50ml: 24.5/30.5mm, 150ml: 32/37mm, 250ml: 32/37.5mm.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Contains 1 each 50, 150, 250, 500 & 1000ml Flask
High quality inert 3.3 borosilicate glass
Height of each as follows:, 50ml = approx. 85mm, 150ml = approx. 120mm, 250ml = approx. 140mm ,500ml = approx. 175mm , 1000ml = approx. 220mm
ASTM Specification E960, Type I requirements
121C/250F conducted in a slow and careful manner to avoid breakage. Heavy Duty Reusable.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Capacity: 500ml / 16oz. (approx.)
Graduations: 50ml, 200ml to 500ml
Height: 186mm / 7.3" (approx.)
Outside Diameter: 107mm / 4.2" (approx.)
High quality inert 3.3 borosilicate glass
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Capacity: 500ml / 16oz. (approx.)
Graduations: 50ml, 200ml to 500ml
Height: 186mm / 7.3" (approx.)
Outside Diameter: 107mm / 4.2" (approx.)
High quality inert 3.3 borosilicate glass
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Capacity: 2000ml
Height: 248mm
Outside Diameter: 153mm
3.3 Borosilicate Glass
Long Neck
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ❌ | ❌ | ❌ |
Capacity: 1000ml
Graduations: 200ml, 400ml to 1000ml
Height: 228mm (approx.)
Outside Diameter: 129mm (approx.)
High quality inert 3.3 borosilicate glass
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Capacity: 1000ml
Graduations: 200ml, 400ml to 1000ml
Height: 228mm (approx.)
Outside Diameter: 129mm (approx.)
High quality inert 3.3 borosilicate glass
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Made of eco-friendly food-grade plastic, durable, non-toxic and odorless.
Standard capacity: clear scale, easier to identify. Standard scale line, for accurate measurement.
Solid base design, for more stable placement, reducing measurement error.
Excellent product quality, with quality assurance. No bubbles, no burrs, smooth and rounded.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
50ml: 85 X 53mm
100ml: 102 X 65mm
250ml: 140 X 83mm
500ml: 172 X 102mm
Material: Polypropylene
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Class A
O.D. x Height(mm): 62 x 171
Tolerance(+/-ml): 0.01
Flat Bottom
Ground Glass Stopper
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Capacity: 500ml / 16oz (approx.)
Rubber Stopper: Solid, Black
Graduations: 50ml, 200ml to 500ml
Height: 186mm / 7.3" (approx.)
Outside Diameter: 107mm / 4.2" (approx.)
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Capacity: 1000ml / 32oz (approx.)
Rubber Stopper: Solid, Black
Graduations: 200ml, 400ml to 1000ml
Height: 228mm / 9" (approx.)
Outside Diameter: 129mm / 5.1" (approx.)
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Contains 1 each 50, 150 and 250ml Flask
Rubber Stopper included
High quality inert 3.3 borosilicate glass
ASTM Specification E960, Type I requirements
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ✅ | ✅ | ✅ |
Flasks: 4 Sizes - 50ml,150ml,250ml,500ml
Magnetic Stir Bar: 25x7mm, Octagonal, PTFE
High quality inert 3.3 borosilicate glass
Thick wall
Heavy Duty Rim
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Lake Charles Manufacturing | 9.85 | ❌ | ❌ | ❌ |
Flasks: 3 Sizes - 50, 150, and 250ml
High quality inert 3.3 borosilicate glass
Heavy Duty Reusable
Large Marking Spot
ASTM Specification E960, Type I requirements
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Karter Scientific | 16 |
We've carried out a comprehensive analysis of 9,959 reviews on flasks, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select flasks priced around $25.15, with top brands including and
Our team of expert editors reviewed these high-quality items and handpicked the top 16 flasks for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include and .
We are dedicated to assisting our users in finding the right flasks Products based on their needs, saving them considerable time when choosing which flasks to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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