{"product_id":"the-vialist-borosilicate-glass-test-tubes","title":"The Vialist | Precision Borosilicate Glass Test Tube Collection","description":"\u003cdiv class=\"product-narrative\"\u003e\n  \u003cp\u003e\u003cstrong\u003ePrecision Begins With the Vessel.\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003eIn laboratories, apothecaries, craft studios, and kitchens alike, the container is never merely a container. It is the interface between substance and measurement — the boundary that defines evaporation rate, reaction surface area, thermal tolerance, and contamination risk. The Vialist is a curated collection of borosilicate glass test tubes, spanning 15 ml to 100 ml, designed for those who understand that the quality of the glass determines the integrity of what it holds. This is not a generic assortment of disposable labware. It is a precision toolkit for anyone who needs thermal shock resistance, optical clarity, chemical inertness, and dimensional consistency across every vessel in the rack.\u003c\/p\u003e\n  \u003cp\u003eBorosilicate glass — the same material family as Pyrex and laboratory-grade Schott DURAN — is the defining material choice here. With a coefficient of thermal expansion approximately one-third that of soda-lime glass, these tubes transition from freezer (-40°C) to direct flame without shattering. The low alkali content means no sodium leaching into sensitive aqueous solutions, no metallic ion contamination in botanical extractions, and no flavor transfer in culinary applications. Each tube is annealed after forming, relieving internal stresses that would otherwise cause spontaneous fracture weeks or months after manufacture — the silent failure mode of cheap import glass that gives borosilicate its reputation as the professional's material.\u003c\/p\u003e\n  \u003cp\u003eThe included cork stoppers are not an afterthought — they are natural, compressible, and provide a micro-porous seal that allows trace gas exchange without admitting dust or insects. For applications where absolute airtightness is required, the cork can be wax-dipped or replaced with a rubber stopper (not included). The 24-piece set covers the full practical spectrum: 15 ml for small-batch essential oil blending, 25 ml for spice and herb storage, 35-50 ml for propagation cuttings and specimen display, and 80-100 ml for bulk dry goods, bath salts, and large-volume tinctures. The uniform 18 mm mouth diameter across all sizes means one cork size fits all — a small but significant detail when you are reaching for a stopper with wet hands or latex gloves.\u003c\/p\u003e\n  \u003cp\u003e\u003cem\u003eMeasure with clarity. Store with confidence. The Vialist ensures the vessel never compromises the work.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-features\" style=\"margin-top: 20px;\"\u003e\n  \u003ch3\u003eKey Features\u003c\/h3\u003e\n  \u003cdiv style=\"margin-bottom: 10px;\"\u003e✦ \u003cstrong\u003eBorosilicate Glass (Type 3.3)\u003c\/strong\u003e — Thermal shock resistant (-40°C to +525°C); low coefficient of thermal expansion (3.3 × 10⁻⁶\/K)\u003c\/div\u003e\n  \u003cdiv style=\"margin-bottom: 10px;\"\u003e✦ \u003cstrong\u003e24-Piece Complete Set\u003c\/strong\u003e — Covers 15 ml, 25 ml, 30 ml, 35 ml, 40 ml, 45 ml, 50 ml, 55 ml, 60 ml, 80 ml, and 100 ml capacities\u003c\/div\u003e\n  \u003cdiv style=\"margin-bottom: 10px;\"\u003e✦ \u003cstrong\u003eAnnealed for Stress Relief\u003c\/strong\u003e — Each tube undergoes post-forming annealing to eliminate internal stresses and prevent spontaneous fracture\u003c\/div\u003e\n  \u003cdiv style=\"margin-bottom: 10px;\"\u003e✦ \u003cstrong\u003eNatural Cork Stoppers Included\u003c\/strong\u003e — Compressible, micro-porous seal; allows trace gas exchange for fermentation and curing\u003c\/div\u003e\n  \u003cdiv style=\"margin-bottom: 10px;\"\u003e✦ \u003cstrong\u003eUniform 18 mm Mouth Diameter\u003c\/strong\u003e — One cork fits all sizes; simplifies workflow in multi-tube procedures\u003c\/div\u003e\n  \u003cdiv style=\"margin-bottom: 10px;\"\u003e✦ \u003cstrong\u003eChemical Inert \u0026amp; Non-Leaching\u003c\/strong\u003e — Low alkali content; no sodium ion transfer to solutions; safe for food, botanical extracts, and reagents\u003c\/div\u003e\n  \u003cdiv style=\"margin-bottom: 10px;\"\u003e✦ \u003cstrong\u003eHigh Optical Clarity\u003c\/strong\u003e — Crystal-clear walls for visual monitoring of reactions, extractions, and propagation root development\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-specs\" style=\"margin-top: 20px;\"\u003e\n  \u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n  \u003cul style=\"list-style: none; padding: 0;\"\u003e\n    \u003cli style=\"border-bottom: 1px solid #eee; padding: 8px 0;\"\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Borosilicate Glass 3.3 (Low-Expansion, High Thermal Resistance)\u003c\/li\u003e\n    \u003cli style=\"border-bottom: 1px solid #eee; padding: 8px 0;\"\u003e\n\u003cstrong\u003eCapacities Included:\u003c\/strong\u003e 15, 25, 30, 35, 40, 45, 50, 55, 60, 80, 100 ml\u003c\/li\u003e\n    \u003cli style=\"border-bottom: 1px solid #eee; padding: 8px 0;\"\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 24 Tubes + 24 Cork Stoppers (48 Pieces Total)\u003c\/li\u003e\n    \u003cli style=\"border-bottom: 1px solid #eee; padding: 8px 0;\"\u003e\n\u003cstrong\u003eMouth Diameter:\u003c\/strong\u003e 18 mm (Uniform Across All Sizes)\u003c\/li\u003e\n    \u003cli style=\"border-bottom: 1px solid #eee; padding: 8px 0;\"\u003e\n\u003cstrong\u003eStopper Material:\u003c\/strong\u003e Natural Cork (Compressible, Micro-Porous)\u003c\/li\u003e\n    \u003cli style=\"border-bottom: 1px solid #eee; padding: 8px 0;\"\u003e\n\u003cstrong\u003eThermal Range:\u003c\/strong\u003e -40°C to +525°C (Direct Flame Safe)\u003c\/li\u003e\n    \u003cli style=\"border-bottom: 1px solid #eee; padding: 8px 0;\"\u003e\n\u003cstrong\u003eCoefficient of Thermal Expansion:\u003c\/strong\u003e 3.3 × 10⁻⁶\/K\u003c\/li\u003e\n    \u003cli style=\"border-bottom: 1px solid #eee; padding: 8px 0;\"\u003e\n\u003cstrong\u003eAlkali Content:\u003c\/strong\u003e Low (\u0026lt;0.1% Na₂O Equivalent)\u003c\/li\u003e\n    \u003cli style=\"border-bottom: 1px solid #eee; padding: 8px 0;\"\u003e\n\u003cstrong\u003eManufacturing Process:\u003c\/strong\u003e Machine-Formed + Post-Forming Annealing\u003c\/li\u003e\n    \u003cli style=\"border-bottom: 1px solid #eee; padding: 8px 0;\"\u003e\n\u003cstrong\u003eCleaning:\u003c\/strong\u003e Dishwasher Safe, Autoclavable at 121°C\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-applications\" style=\"margin-top: 20px;\"\u003e\n  \u003ch3\u003eApplication Scenarios\u003c\/h3\u003e\n  \u003cp\u003eThe Vialist serves a remarkably diverse user base united by their need for precision containment. Home apothecaries and herbalists use the 15-30 ml tubes for tincture and essential oil blending, the 50 ml for dried herb storage, and the 100 ml for bulk infusion batches. Craft bartenders and mixology enthusiasts create flight-style tasting presentations with bitters, syrups, and infused spirits arranged by volume in a wooden rack (not included). Plant propagators use the 35-50 ml tubes as water-rooting vessels for cuttings — the optical clarity allows root development monitoring without disturbing the cutting. Science educators and homeschool parents have a complete set of lab-grade vessels for chemistry demonstrations, pH testing, and crystal-growing experiments. Wedding and event designers use the tubes as bud vases, place-card holders, and favor containers — the uniform 18 mm mouth accepts standard taper candles as well. This is not a single-use product. It is twenty-four precision instruments in a box, and each one finds its calling in a different discipline.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-faq\" style=\"margin-top: 20px;\"\u003e\n  \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n  \u003cdiv style=\"margin-bottom: 15px;\"\u003e\n    \u003cp\u003e\u003cstrong\u003eQ: Can these tubes be boiled or autoclaved?\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cp\u003eA: Yes. Borosilicate glass is autoclave-safe at 121°C and can be boiled directly in water. The cork stoppers should be removed before sterilization — cork is not autoclavable and may degrade with repeated boiling.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin-bottom: 15px;\"\u003e\n    \u003cp\u003e\u003cstrong\u003eQ: Are the cork stoppers truly airtight?\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cp\u003eA: Natural cork provides a micro-porous seal — it blocks dust and insects while allowing minimal gas exchange, which is ideal for fermentation, curing, and aging applications. For applications requiring absolute airtightness, you can wax-dip the cork tops or substitute with size-00 rubber stoppers (not included).\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin-bottom: 15px;\"\u003e\n    \u003cp\u003e\u003cstrong\u003eQ: Is borosilicate glass really worth the premium over regular glass?\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cp\u003eA: For thermal applications (freezer-to-flame, boiling, autoclaving), absolutely. Soda-lime glass will shatter under these conditions. For chemical applications, borosilicate's low alkali content prevents sodium leaching that can alter solution pH and contaminate extractions. For longevity, the annealing process eliminates internal stresses that cause delayed spontaneous fracture. If your use case involves heat, chemicals, or long-term storage of valuable contents, borosilicate is not a luxury — it is insurance.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin-bottom: 15px;\"\u003e\n    \u003cp\u003e\u003cstrong\u003eQ: Can I write on these tubes for labeling?\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cp\u003eA: Yes — use a white or metallic permanent marker, china marker (grease pencil), or adhesive labels. For laboratory use requiring solvent resistance, etch the glass with a diamond-tip pen or use chemical-resistant labeling tape.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin-bottom: 15px;\"\u003e\n    \u003cp\u003e\u003cstrong\u003eQ: What is the wall thickness of the tubes?\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cp\u003eA: Wall thickness ranges from approximately 0.8 mm (15 ml) to 1.2 mm (100 ml). This is standard for laboratory-grade test tubes — thick enough for thermal resilience and mechanical handling, thin enough for efficient heat transfer during heating and cooling procedures.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-gallery\" style=\"margin-top: 30px; text-align: center;\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/H61a207ecd3b54c27b3ef40d92c05133a6.jpg?v=1673656689\" style=\"max-width: 100%; margin-bottom: 10px;\" alt=\"15ml\/25ml\/30ml\/35ml\/40ml\/45ml\/50ml\/55ml\/60ml\/80ml\/100ml Small Glass Test Tube wi\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/Ha949811da65345bb9e9a9c76c59bd060r.jpg?v=1673656690\" style=\"max-width: 100%; margin-bottom: 10px;\" alt=\"15ml\/25ml\/30ml\/35ml\/40ml\/45ml\/50ml\/55ml\/60ml\/80ml\/100ml Small Glass Test Tube wi\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/H8a412b4eac6d47099e2ed9d8b74e141d4.jpg?v=1673656693\" style=\"max-width: 100%; margin-bottom: 10px;\" alt=\"15ml\/25ml\/30ml\/35ml\/40ml\/45ml\/50ml\/55ml\/60ml\/80ml\/100ml Small Glass Test Tube wi\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/H0a5642aef21c47b5b3428b2316939760Q.jpg?v=1673656695\" style=\"max-width: 100%; margin-bottom: 10px;\" alt=\"15ml\/25ml\/30ml\/35ml\/40ml\/45ml\/50ml\/55ml\/60ml\/80ml\/100ml Small Glass Test Tube wi\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/H5eabe6bd367f43adb4189921168a90a3g.jpg?v=1673656698\" style=\"max-width: 100%; margin-bottom: 10px;\" alt=\"15ml\/25ml\/30ml\/35ml\/40ml\/45ml\/50ml\/55ml\/60ml\/80ml\/100ml Small Glass Test Tube wi\"\u003e\n  \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/Hd4a286c4b84b4ff88ade28714ea33a48D.jpg?v=1673656701\" style=\"max-width: 100%; margin-bottom: 10px;\" alt=\"15ml\/25ml\/30ml\/35ml\/40ml\/45ml\/50ml\/55ml\/60ml\/80ml\/100ml Small Glass Test Tube wi\"\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"The Vialist | Precision Borosilicate Glass Test Tube Collection\",\n  \"description\": \"24-piece borosilicate glass test tube collection (15ml-100ml) with natural cork stoppers. 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