What is the main advantage of this pear-shaped design compared to a standard round-bottom flask?

The tapered bottom allows for maximized recovery of liquids and solids. It is specifically designed for rotary evaporators to concentrate the solution to a small volume, making it much easier to remove the final residue with a pipette or spatula.

Is this flask suitable for high-vacuum applications? I'm worried about implosion.

Yes, absolutely. This is a Heavy Wall flask made from high-quality Borosilicate 3.3 glass. It features a reinforced wall thickness and is annealed at 560°C to remove thermal stress, ensuring safety under high vacuum and varying pressures.

Will these joints fit my existing glassware from other major US brands (like Chemglass or Ace)?

Yes, the ground glass joints (14/20 or 24/40) are manufactured strictly according to US Standard Taper specifications. They offer a universal fit and a leak-proof seal with any standard lab glassware or rotary evaporator setups.

Is it difficult to clean the bottom tip of the flask?

While the tapered shape concentrates samples, the smooth interior surface of our Borosilicate 3.3 glass minimizes residue adhesion. For sticky substances, we recommend using an ultrasonic bath or a standard flask brush to easily reach the bottom.

Glassware often arrives broken. How is this packaged?

This flask is packed in reinforced packaging with custom-fit foam to prevent movement during transit. In the rare event of damage, please let us know immediately for a hassle-free replacement—no return of the broken glass is required.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Laboy Glass 50mL Heavy Wall Pear-Shaped Flask with 24/40 Joint, Borosilicate 3.3 Hand-Blown Recovery Flask for Rotary Evaporator, Organic Chemistry Pack of 2

Product ID: 74736604

🔄10-15% improved evaporation efficiency

🔥Annealed at 560°C for thermal stability

🧪3.5-5mm heavy wall thickness

₨871

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Description

🧪 Elevate your lab game with flasks that work as hard as you do!

THERMAL MASTERY - Scientifically annealed at 560°C to endure rapid temperature changes and direct flame without cracking.
SEAMLESS LAB INTEGRATION - Precision 24/40 ground-glass joint ensures a vacuum-tight, secure fit with standard rotary evaporators and distillation setups.
OPTIMIZED RECOVERY GEOMETRY - Pear-shaped design boosts solvent evaporation efficiency by up to 15%, maximizing your valuable sample yield.
WORRY FREE SHIPPING SUPPORT - Reinforced packaging plus hassle-free replacement policy means your experiments never miss a beat.
BUILT TO LAST ENGINEERED TO PERFORM - Extra-heavy 3.5-5mm thick borosilicate walls for unmatched durability and breakage resistance.

The Laboy Glass 50mL Heavy Wall Pear-Shaped Flask is a premium borosilicate 3.3 hand-blown recovery flask designed for rotary evaporators. Featuring ultra-thick 3.5-5mm walls and annealing at 560°C, it offers superior durability and thermal resistance. Its pear-shaped design enhances evaporation efficiency by 10-15%, while the standard 24/40 joint guarantees compatibility with most lab equipment. Sold in packs of two, it combines rugged reliability with precision engineering to optimize organic chemistry workflows.

Specifications

ASIN	B0GCBPCQM9
Best Sellers Rank	#735,800 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #10 in Lab Recovery Flasks
Brand Name	LABOY
Customer Reviews	5.0 out of 5 stars 6 Reviews
Manufacturer	Laboy
Part Number	HMF011110
Unit Count	2.0 Count

Reviews

B**R

The BEST !!

Laboy is absolutely the best lab glass Ive ever held in my hands, let alone had the pleasure to work with. Its thick and beefy and will stand up to whatever you want to use it for. You wont go wrong with this company. It does take about a month to get to you since it comes from Beijing China, but its well worth the wait.

7.08.2019

L**I

Arrives faster than predicted, seems perfect

Exactly what I wanted. Also quite rugged — didn't break when I dropped it. Ground-glass joints precisely fit other Laboy items.

7.08.2018

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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The delivery time was excellent, and the packaging was secure.

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₨871

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Seychelles.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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