Can i use at 15 psi in pressure cooker?

Absolutely be sure lids are closed tight. I made the mistake of having them a bit cracked and my liquid boiled out. Also fill water in pressure cooker as high as the water is in the bottle.

Can these be used on a magnetic stirrer with a hot plate?

Some of the bottoms of mine are insanely uneven, but i have used them on a hot plate with stirrer and i have also used them in a pressure cooker and they have had no real problems so far.

How do you exlain one of mine cracking from thermal shock when I added room temp water after being microwaved for thirty seconds?

Very poor tempering, poor quality glass. I doubt these bottles are really borosilicate. I’ve had the same thermal cracking issues. From now on, I’m buying real Corning or Kimax.

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Karter Scientific 50ml Glass Round Media Storage Bottles with GL32 Screw Cap, Borosilicate, (Case of 6)

Karter Scientific 50ml Glass Round Media Storage Bottles with GL32 Screw Cap, Borosilicate, (Case of 6)

Product ID: 501509727

Details

Bottle Type
Media Storage
Brand
Karter
Capacity
50 Milliliters
Color
Pack of 6
Material
Borosilicate

🔵GL32 leak-proof screw cap

🧊3.3 borosilicate glass durability

🧪50ml precision capacity

€ 59.74

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔬 Elevate your lab game with precision and style!

BUILT TO LAST - Thickened 3.3 borosilicate glass resists thermal shock and chemical wear
SECURE SPILL FREE - GL32 blue polypropylene screw cap ensures leak-proof storage
COMPACT CONVENIENT - Slim 3.5" x 1.6" design fits effortlessly into any lab or workspace
ECO CHIC REUSABILITY - Durable, machine-washable bottles designed for sustainable, repeated use
PRECISION MEETS PRACTICALITY - Accurate 20ml graduations for flawless measurement every time

Karter Scientific’s 50ml round media storage bottles come in a pack of six, crafted from thickened 3.3 borosilicate glass for superior durability and thermal resistance. Featuring clear 20ml graduations and a GL32 blue polypropylene screw cap, these leak-proof bottles offer precise, secure storage ideal for professional lab environments. Compact and reusable, they combine functionality with sustainability for the modern scientific workspace.

Specifications

ASIN	B09DGN2X8G
Additional Features	Leak Proof
Age Range Description	Adult
Best Sellers Rank	#17,860 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Lab Media Bottles
Bottle Type	Media Storage Bottle
Brand	Karter Scientific
Brand Name	Karter Scientific
Capacity	50 ml
Color	Pack of 6
Container Type	Bottle, Round
Customer Reviews	4.3 out of 5 stars 834 Reviews
Finish Types	Glass
Item Dimensions W x H	1.6"W x 3.5"H
Item Weight	0.73 Kilograms
Manufacturer	Karter Scientific
Manufacturer Part Number	219L5
Material	Borosilicate Glass
Material Type	Borosilicate Glass
Number of Items	6
Product Care Instructions	Machine Wash
Recommended Uses For Product	Storage
Reusability	Reusable
Shape	Round
Special Feature	Leak Proof
Specific Uses For Product	Storage
Style Name	PACK OF 6
Theme	Science
Unit Count	6.0 Count

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