--- product_id: 377340303 title: "250ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, Karter Scientific 251L5 (Pack of 6)" brand: "karter scientific" price: "KD 62.11" currency: KWD in_stock: false reviews_count: 5 category: "Karter Scientific" url: https://www.desertcart.com.kw/products/377340303-250ml-glass-round-media-storage-bottles-with-gl45-screw-cap store_origin: KW region: Kuwait --- # withstands 140°C heat GL45 autoclavable screw cap 250ml precision volume 250ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, Karter Scientific 251L5 (Pack of 6) **Brand:** karter scientific **Price:** KD 62.11 **Availability:** ❌ Out of Stock ## Summary > 🧬 Elevate your lab game with precision and durability in every drop! ## Quick Answers - **What is this?** 250ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, Karter Scientific 251L5 (Pack of 6) by karter scientific - **How much does it cost?** KD 62.11 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/377340303-250ml-glass-round-media-storage-bottles-with-gl45-screw-cap) ## Best For - karter scientific enthusiasts ## Why This Product - Trusted karter scientific brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact yet capacious:** 250ml volume in a sleek 140mm x 70mm footprint fits seamlessly into any workspace or lab bench. - • **Autoclavable GL45 screw cap:** Blue polypropylene cap seals tight with drip-free pouring ring, perfect for sterile environments. - • **Precision-graded for accuracy:** Graduated markings every 25ml ensure exact measurement for professional lab or creative use. - • **Multipurpose heavy-duty design:** Ideal for storage, mixing, sampling, and sterilization—engineered for the modern scientific or creative professional. - • **Industrial-grade borosilicate glass:** Ultra-durable, chemical-resistant glass with minimal thermal expansion for reliable performance under stress. ## Overview Karter Scientific’s 250ml borosilicate glass round bottles come in a pack of six, featuring precise 25ml graduations and a robust GL45 blue polypropylene screw cap. Crafted from high-grade borosilicate glass, these bottles resist chemical corrosion and thermal shock up to 140°C, making them perfect for laboratory storage, mixing, and sterilization tasks. Their compact design and heavy-duty build ensure they meet the demands of professionals who value reliability and precision. ## Description These heavy duty borosilicate glass round bottles can be used for storage as well as mixing and sampling. They include a linerless, one-piece autoclavable blue polypropylene plug seal GL45 threaded cap with a drip-free pouring ring. Max temperature of 140 degrees Celsius (284 degrees Fahrenheit). NON-ALKALINE-EARTH BOROSILICATE GLASS (BOROSILICATE GLASS 3.3): The B2O3 content for borosilicate glass is typically 12–13% and the SiO2 content over 80%. High chemical durability and low thermal expansion (3.3 × 10−6 K−1) – the lowest of all commercial glasses for large-scale technical applications – make this a multitalented glass material. High-grade borosilicate flat glasses are used in a wide variety of industries, mainly for technical applications that require either good thermal resistance, excellent chemical durability, or high light transmission in combination with a pristine surface quality. Other typical applications for different forms of borosilicate glass include glass tubing, glass piping, glass containers, etc. especially for the chemical industry. ALKALINE-EARTH-CONTAINING BOROSILICATE GLASSES (BOROSILICATE GLASS):In addition to about 75% SiO2 and 8–12% B2O3, these glasses contain up to 5% alkaline earths and alumina (Al2O3). This is a subtype of slightly softer glasses, which have thermal expansions in the range (4.0–5.0) × 10−6 K−1. Review: Works well for the sterilization process. Review: Sturdy (thick glass), easy to see contents. I use it for mixing up model engine diesel fuel and storing it. I wasn't confident that it would be air-tight, but it was easy to put an o-ring in the cap just to be sure. ## Features - Volume: 250ml - Graduations: 25ml, from 50ml to 200ml - Screw Cap: GL45 Blue Polypropylene - Dimensions: 140mm x 70mm (5.5in x 2.75in) - Borosilicate Glass ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07WTRQNSD | | Are batteries included? | No | | Bottle Type | round | | Brand | Karter Scientific | | Capacity | 250 Milliliters | | Colour | Pack of 6 | | Country of Origin | USA | | Customer Reviews | 4.4 4.4 out of 5 stars (660) | | Date First Available | 27 August 2019 | | Finish Type | Glass | | Item Weight | 1 kg 700 g | | Item model number | 251L5 | | Manufacturer | Karter Scientific | | Material | Borosilicate Glass | | Model number | 251L5 | | Net Quantity | 6.0 Count | | Number of Items | 6 | | Package Information | Bottle | | Product Care Instructions | Hand Wash | | Product Dimensions | 7W x 14H Centimeters | | Recommended Uses For Product | storage | | Reusability | Reusable | | Shape | Round | | Special Feature | heavy duty | | Specific Uses For Product | Storage, Laboratory Use | | Style | Borosilicate Glass | | Theme | Science | ## Product Details - **Bottle Type:** round - **Brand:** Karter Scientific - **Capacity:** 250 Milliliters - **Colour:** Pack of 6 - **Material:** Borosilicate Glass ## Images ![250ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, Karter Scientific 251L5 (Pack of 6) - Image 1](https://m.media-amazon.com/images/I/61yWuAxGEiL.jpg) ![250ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, Karter Scientific 251L5 (Pack of 6) - Image 2](https://m.media-amazon.com/images/I/614LYmnpM9L.jpg) ![250ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, Karter Scientific 251L5 (Pack of 6) - Image 3](https://m.media-amazon.com/images/I/516FbhnQIuL.jpg) ![250ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, Karter Scientific 251L5 (Pack of 6) - Image 4](https://m.media-amazon.com/images/I/71W1Ajk2ThL.jpg) ![250ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, Karter Scientific 251L5 (Pack of 6) - Image 5](https://m.media-amazon.com/images/I/71lQSw5roWL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: Can i use at 15 psi in pressure cooker?** A: 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. **Q: Can these be used on a magnetic stirrer with a hot plate?** A: 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. **Q: How do you exlain one of mine cracking from thermal shock when I added room temp water after being microwaved for thirty seconds?** A: 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. **Q: Can these be frozen with liquid inside?** A: Yes no problem ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by B***. on 4 October 2025* Works well for the sterilization process. ### ⭐⭐⭐⭐⭐ Review *by M***R on 30 March 2025* Sturdy (thick glass), easy to see contents. I use it for mixing up model engine diesel fuel and storing it. I wasn't confident that it would be air-tight, but it was easy to put an o-ring in the cap just to be sure. ### ⭐⭐⭐⭐⭐ Review *by E***A on 29 April 2022* Estas botellas de medio son de excelente calidad y se ven muy bien. Las uso para almacenar soluciones en mi laboratorio. ## Frequently Bought Together - Karter Scientific 250ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, 251L5 (Case of 6) - Labvida Upgrated 6 Size Low Form Glass Beaker Set, 25ml 50ml 100ml 250ml 500ml 1000ml, 3.3 Boro Glass beakers with Printed Graduation, LVA019 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.kw/products/377340303-250ml-glass-round-media-storage-bottles-with-gl45-screw-cap](https://www.desertcart.com.kw/products/377340303-250ml-glass-round-media-storage-bottles-with-gl45-screw-cap) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-05-15*