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.

Laboy Glass 50ml Heavy Wall Pear Shaped Flask With 24

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

Extreme Durability & Heavy Wall Construction: Engineered with extra-heavy 3.5mm to 5mm thick walls. This robust structure significantly improves mechanical strength and resistance to accidental breakage, far exceeding the durability of standard laboratory glassware.
Scientifically Annealed at 560°C: Each flask undergoes a precise annealing process at 560°C to effectively remove internal strain. This critical step ensures maximum thermal stability, allowing the flask to withstand direct flame and rapid temperature changes without cracking.
Maximized Solvent Recovery: The pear-shaped design maximizes surface area relative to volume. This geometry is engineered to improve evaporation efficiency by 10-15% compared to round-bottom flasks, ensuring minimal loss of valuable samples.
Standard 24/40 Joint Compatibility: Precision ground to fit standard rotary evaporators and distillation systems. The 24/40 taper offers versatile connectivity for broader laboratory setups while maintaining a secure, vacuum-tight seal for efficient operation.
Hassle-Free After-Sales Support: We pack with extra care using reinforced boxes. However, if your flask arrives broken due to shipping, please contact us directly for an immediate replacement or refund—no return required. We are here to ensure your experiments proceed without delay.

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: desertcart.com: Industrial & Scientific Review: 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. Review: 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.

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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Are the products genuine and authentic?+

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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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

C$2752

Duties & taxes included

In stock

Sold byAmazon NicaraguaDelivered 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 Nicaragua.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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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

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

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Common Questions