--- product_id: 415199532 title: "500ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, 251M8 (Pack of 2)" brand: "karter scientific" price: "$87.32" currency: USD in_stock: true reviews_count: 13 category: "Karter Scientific" url: https://www.desertcart.us/products/415199532-500ml-glass-round-media-storage-bottles-with-gl45-screw-cap store_origin: US region: United States of America --- # GL45 leak-proof screw cap durable borosilicate glass 500ml precision capacity 500ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, 251M8 (Pack of 2) **Brand:** karter scientific **Price:** $87.32 **Availability:** ✅ In Stock ## Summary > 🧪 Elevate your lab game with precision and style—because your experiments deserve the best. ## Quick Answers - **What is this?** 500ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, 251M8 (Pack of 2) by karter scientific - **How much does it cost?** $87.32 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/415199532-500ml-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 - • **Lab-Grade Toughness:** Crafted from thickened borosilicate glass, resistant to thermal shock and chemical corrosion. - • **Secure & Spill-Free:** GL45 blue polypropylene screw cap ensures airtight, leak-proof storage—no mess, no stress. - • **Compact & Convenient:** Perfectly sized at 7" x 3.5" for easy handling and storage in any professional workspace. - • **Eco-Friendly Reusability:** Pack of 2 reusable bottles designed for sustainable, long-term lab and media storage. - • **Precision Meets Durability:** 500ml capacity with clear 50ml graduations for exact measurements every time. ## Overview The Karter Scientific 500ml Glass Round Media Storage Bottles (Pack of 2) feature thickened borosilicate glass for superior durability, precise 50ml graduations for accurate measurement, and a GL45 blue polypropylene screw cap that guarantees leak-proof, airtight storage. Sized at 7" x 3.5", these reusable bottles are ideal for professional lab environments seeking reliable, eco-conscious media storage solutions. ## Description Buy Karter Scientific 500ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, 251M8 (Pack of 2): Media Bottles - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Great quality for the price - Used some of the 10 bottles I ordered (I ordered 5 sets with 2 bottles in each, at different times, I believe from the same seller) and they did well in autoclave for 4 cycles sterilization in a row (the autoclave was having issues and it stetilized the bottles in a series of repetitions, by the error) and the caps, nor the glass got damaged in a process in extended periods of high pressure and heat! This suggests that they are great quality. The design itself is good, but there is some accumulation of moisture even in the dry bottles, so I suggest to sterilize them on the tray without any moisture to prevent that. I will watch for any contamination issues, but they seem so far not leaking. I did sterilized ddH2O in some as well, and they probably will be used mostly for these and small volumes of media storage, such as molten agar for short term storage. I will update if any functionality is affected, but so far, for the price, these are great addition for small volume media storage, such as molten agar, small volumes of reagents that you might need to keep in several bottles to prevent contamination from reopening (such as liquid media for culturing) and some frequently used reagents/solutions/stetile water. I haven't used them for any dry powders, but if they are planning on doing so, I sugest to dry them well after 1st stetilization and use them then (if you don't need to keep the powders sterile, or resterilize the 2nd time of the dried bottles. I would make sure to keep the tape on both sides of the cap as they unscrew a little more than the other media bottles I used to prevent contamination. I haven't measured them exactly, but the opening on these is the standard as in the larger bottles as these caps fit on the other larger bottles. In a summary: great 100ml bottles for small (60ml mark is at half the bottle, so you can easily go for 50-60ml volumes in autoclave if using them for solutions/water/media) volumes that are inexpensive and good quality for its purpose. Review: High Quality Bottles - Everything you want for a bottle that could potentially hold harsh chemicals is here. The tops screw on tight and are sealed perfectly when closed, no leaks whatsoever and they are air tight. They can pour liquids very nicely without the liquid going everywhere even though there is no "spout" or anything like a beaker would have, not sure how but they pour as well as a beaker or better with no liquid running down the side or going where you don't want it. The borosilicate glass is thick and will withstand any chemical you throw at it (except hydrofluoric acid obviously, don't use that in glass) as well as withstanding temperatures normal glass will not. I could see a lot of uses for these outside of holding liquid chemicals that need a leak proof borosilicate bottle, maybe moonshiners might like them (probably the larger sized version of these same bottles, which I also bought and am also very happy with) or for the rest of us non moonshiners, maybe holding or mixing other beverages as you can shake these without fear of spilling. Any liquid you need to hold except hydrofluoric acid (sorry Walter White) these will do great and they come in whatever size you could want. ## Features - Capacity: 500ml / 16oz. - Graduations: 50ml, from 100ml to 400ml - Screw Cap: GL45 Blue Polypropylene - Dimensions: 178mm x 89mm / 7" x 3.5" (approx.) - Thickened Borosilicate Glass ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09S3VYPS1 | | Additional Features | Leak Proof | | Age Range Description | Adult | | Best Sellers Rank | #22,365 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Lab Media Bottles | | Bottle Type | Media Storage Bottle | | Brand | Karter Scientific | | Brand Name | Karter Scientific | | Capacity | 500 ml | | Color | Pack of 2 | | Container Type | bottle | | Customer Reviews | 4.3 out of 5 stars 842 Reviews | | Item Dimensions W x H | 3.5"W x 7"H | | Item Weight | 0.89 kg | | Manufacturer | Karter Scientific | | Manufacturer Part Number | 251M8 | | Material | Borosilicate Glass | | Material Type | Borosilicate Glass | | Model Number | 251M8 | | Number of Items | 2 | | 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 2 | | Theme | Science | | Unit Count | 2 Count | ## Product Details - **Bottle Type:** Media Storage Bottle - **Brand:** Karter Scientific - **Capacity:** 500 ml - **Color:** Pack of 2 - **Material:** Borosilicate Glass ## Images ![500ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, 251M8 (Pack of 2) - Image 1](https://m.media-amazon.com/images/I/61Zysk6to+L.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great quality for the price *by S***D on December 9, 2019* Used some of the 10 bottles I ordered (I ordered 5 sets with 2 bottles in each, at different times, I believe from the same seller) and they did well in autoclave for 4 cycles sterilization in a row (the autoclave was having issues and it stetilized the bottles in a series of repetitions, by the error) and the caps, nor the glass got damaged in a process in extended periods of high pressure and heat! This suggests that they are great quality. The design itself is good, but there is some accumulation of moisture even in the dry bottles, so I suggest to sterilize them on the tray without any moisture to prevent that. I will watch for any contamination issues, but they seem so far not leaking. I did sterilized ddH2O in some as well, and they probably will be used mostly for these and small volumes of media storage, such as molten agar for short term storage. I will update if any functionality is affected, but so far, for the price, these are great addition for small volume media storage, such as molten agar, small volumes of reagents that you might need to keep in several bottles to prevent contamination from reopening (such as liquid media for culturing) and some frequently used reagents/solutions/stetile water. I haven't used them for any dry powders, but if they are planning on doing so, I sugest to dry them well after 1st stetilization and use them then (if you don't need to keep the powders sterile, or resterilize the 2nd time of the dried bottles. I would make sure to keep the tape on both sides of the cap as they unscrew a little more than the other media bottles I used to prevent contamination. I haven't measured them exactly, but the opening on these is the standard as in the larger bottles as these caps fit on the other larger bottles. In a summary: great 100ml bottles for small (60ml mark is at half the bottle, so you can easily go for 50-60ml volumes in autoclave if using them for solutions/water/media) volumes that are inexpensive and good quality for its purpose. ### ⭐⭐⭐⭐⭐ High Quality Bottles *by B***Y on December 13, 2023* Everything you want for a bottle that could potentially hold harsh chemicals is here. The tops screw on tight and are sealed perfectly when closed, no leaks whatsoever and they are air tight. They can pour liquids very nicely without the liquid going everywhere even though there is no "spout" or anything like a beaker would have, not sure how but they pour as well as a beaker or better with no liquid running down the side or going where you don't want it. The borosilicate glass is thick and will withstand any chemical you throw at it (except hydrofluoric acid obviously, don't use that in glass) as well as withstanding temperatures normal glass will not. I could see a lot of uses for these outside of holding liquid chemicals that need a leak proof borosilicate bottle, maybe moonshiners might like them (probably the larger sized version of these same bottles, which I also bought and am also very happy with) or for the rest of us non moonshiners, maybe holding or mixing other beverages as you can shake these without fear of spilling. Any liquid you need to hold except hydrofluoric acid (sorry Walter White) these will do great and they come in whatever size you could want. ### ⭐⭐⭐⭐⭐ Love it! *by A***E on May 6, 2026* These are perfect for me - I have been using these to travel (through TSA) without any issues. It is leak proof and is truly lab grade. It is easy to clean. This is dishwasher safe, as these are made to withstand temperatures of an autoclave. ## Frequently Bought Together - 500ml Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, Karter Scientific 251M8 (Pack of 2) - Organic Light Dried Malt Extract DME - Maltoferm 10001-1 Lb - Telephone Brand Agar Agar Powder 25 g.x2 Pack --- ## 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.us/products/415199532-500ml-glass-round-media-storage-bottles-with-gl45-screw-cap](https://www.desertcart.us/products/415199532-500ml-glass-round-media-storage-bottles-with-gl45-screw-cap) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-10-17*