The core difference is heat resistance: the borosilicate version Borosilicate Glass Bottles Pack of 6 withstands temperatures from −80°C to 170°C and is safe for boiling water and hot beverages, while the soda lime version Glass Water Bottles Pack of 6 is suited to warm and cold liquids only and should not be used with extreme heat. Both packs include 6 bottles with leakproof stainless steel caps, and both are BPA-free. Capacity differs slightly — soda lime bottles hold 18 oz (500 ml) each; borosilicate bottles hold 18.8 oz each. Dimensions are also close but not identical: soda lime measures 8.7″ H × 2.6″ diameter; borosilicate measures 8.86″ H × 2.56″ wide. If you plan to fill your bottles with hot drinks, tea, hot water, or soups, choose borosilicate. For cold water, juice, smoothies, kefir, and room-temperature liquids, either version works.

The Brieftons borosilicate glass bottles Borosilicate Glass Bottles Pack of 6 are the correct choice for hot liquids, including boiling water, hot tea, and hot coffee — they are rated from −80°C to 170°C. The soda lime bottles Glass Water Bottles Pack of 6 are not designed for extreme heat; sudden thermal stress can cause soda lime glass to crack or shatter. Borosilicate glass has a significantly lower coefficient of thermal expansion than soda lime glass, which is why it handles the transition from cold to boiling without breaking.

Yes, both Brieftons glass bottle products are BPA-free. The soda lime set Glass Water Bottles Pack of 6 is also free of lead, cadmium, and phthalates — verified on the product listing. Glass itself contains no BPA by nature; the leakproof stainless steel caps also contribute no BPA. For context, borosilicate glass has been shown to leach 20–30 times less BPA than polycarbonate plastic even when filled with hot liquids.

The soda lime bottles Glass Water Bottles Pack of 6 measure 8.7 inches tall by 2.6 inches in diameter. The borosilicate bottles Borosilicate Glass Bottles Pack of 6 measure 8.86 inches tall by 2.56 inches wide. Both are compact enough to fit most standard car cup holders (which typically range from 2.5″ to 3″ in diameter) and standard refrigerator door shelves.

Both Brieftons glass bottle types have the same mouth size: 1.2 inches inner diameter and 1.6 inches outer diameter. This is a wide-mouth design that accommodates standard cleaning brushes, ice cubes, and fruit slices. The included cleaning brush (in the soda lime set) is sized to fit this opening.

Both the soda lime Glass Water Bottles Pack of 6 and borosilicate Borosilicate Glass Bottles Pack of 6 Brieftons glass bottle sets include 6 bottles. The soda lime set also includes a bottle cleaning brush and 2 juicing recipe eBooks. The borosilicate set includes 2 recipe eBooks.

Each soda lime bottle Glass Water Bottles Pack of 6 holds 18 oz (500 ml). Each borosilicate bottle Borosilicate Glass Bottles Pack of 6 holds 18.8 oz. Both are single-serve sizes suitable for a full glass of water, a smoothie, a juice portion, or a serving of homemade kefir.

Brieftons glass bottles are suited to a wide range of liquids: water, juice, smoothies, kefir, kombucha, fermented drinks, sauces, salad dressings, and essential oils. Glass is chemically non-reactive, so it does not absorb odours or flavours, making it reliable for acidic liquids (citrus juice, vinegar-based dressings) and fermented beverages where plastic containers can harbour bacteria or pick up off-flavours. For hot beverages — tea, hot water, hot coffee — use only the borosilicate version Borosilicate Glass Bottles Pack of 6, as soda lime glass is not rated for extreme heat.

Yes, Brieftons glass bottles work well for kefir and other fermented drinks. Glass is non-reactive and does not leach chemicals into acidic fermented beverages the way plastic can, and it does not retain flavours between batches. The stainless steel cap with a food-grade silicone O-ring on the soda lime set Glass Water Bottles Pack of 6 creates an airtight seal suitable for storing finished kefir in the refrigerator. Note that if you are doing a second fermentation that generates carbonation, leave a small headspace and monitor pressure, as these bottles are not pressure-rated swing-top vessels like some dedicated fermentation bottles.

Brieftons glass bottles should not be used to freeze liquids. Water and other liquids expand as they freeze, and that expansion can crack or break the glass — this applies to both the soda lime and borosilicate versions. If you want to freeze solid foods in glass containers, Brieftons borosilicate glass food storage containers (a separate product) are designed for freezer use with solid foods. For the bottles specifically, refrigerator storage is fine; freezer storage of liquids is not.

You can pour boiling water into the Brieftons borosilicate glass bottles Borosilicate Glass Bottles Pack of 6, which are rated up to 170°C. Do not pour boiling water into the soda lime bottles Glass Water Bottles Pack of 6 — they are not heat-rated for extreme temperatures and thermal shock can cause them to crack. If you regularly fill your bottles from a kettle or want to use them for hot tea, the borosilicate set is the right product to buy.

Yes. The soda lime bottles Glass Water Bottles Pack of 6 use a 201-grade stainless steel cap fitted with a food-grade silicone O-ring that creates an airtight, leakproof seal when closed. The borosilicate bottles Borosilicate Glass Bottles Pack of 6 also have a leakproof stainless steel lid. To maintain the seal, ensure the silicone O-ring on the soda lime cap is seated correctly after washing and is not worn or cracked; replacement caps are available as a separate accessory (B01LCJSN7Y, 2-pack).

Yes, Brieftons glass bottles fit in most standard car cup holders. The soda lime bottles are 2.6 inches in diameter; most car cup holders measure between 2.5 and 3 inches in diameter. The borosilicate bottles are 2.56 inches wide and will also fit standard cup holders. If your vehicle has a particularly snug or undersized cup holder, confirm the measurement before relying on this fit.

Yes, Brieftons glass bottles are a practical choice for storing fresh juice. Glass does not absorb citrus oils or fruit pigments and will not impart plastic taste the way some reusable plastic bottles do. The 18 oz (500 ml) capacity of the soda lime bottles is a standard single-serve juice portion. The wide 1.2-inch inner mouth opening makes it straightforward to pour juice in without a funnel, and the airtight stainless steel cap keeps juice fresh in the refrigerator. The included eBooks cover juicing recipes specifically.

Only the borosilicate bottles Borosilicate Glass Bottles Pack of 6 are safe for hot coffee or tea — they handle temperatures up to 170°C without thermal stress cracking. The soda lime bottles Glass Water Bottles Pack of 6 are not suited to hot beverages; the glass can crack if exposed to sudden high heat. If you plan to use the bottles primarily as a daily take-along for hot drinks, buy the borosilicate version. Note that the stainless steel caps are not insulating, so the bottle exterior will become warm to the touch — the optional silicone sleeves (B076BMYS9Z) provide some grip and minor insulation.

The glass bottles themselves are dishwasher-safe. The caps are best hand-washed — repeated dishwasher cycles can degrade the silicone O-ring gasket on the soda lime bottle caps, eventually reducing the leakproof seal. Separating the cap from the bottle before washing also ensures the interior of the bottle gets properly cleaned in the dishwasher.

Hand washing is recommended for the caps. The stainless steel itself can go in a dishwasher, but the food-grade silicone O-ring inside the soda lime bottle cap Glass Water Bottles Pack of 6 can degrade faster with repeated high-heat dishwasher cycles, which may eventually compromise the airtight seal. Rinsing the cap under warm water and wiping it clean takes under a minute and preserves the gasket longer. If the O-ring does wear out, replacement caps are available separately (B01LCJSN7Y).

For routine cleaning, rinse the bottle immediately after use, then wash with warm soapy water using the included cleaning brush (supplied with the soda lime 6-pack, B01DN6001G), which is sized to reach the full interior through the 1.2-inch mouth opening. The glass bottles are dishwasher-safe for a more thorough clean — place them upright or at an angle so water drains freely. Hand wash the caps separately to protect the silicone O-ring. For bottles used for kefir, fermented drinks, or strong-flavoured liquids, a soak in a diluted white vinegar solution (1 part vinegar to 4 parts water) for 15–20 minutes removes residual odours before a normal wash.

The soda lime bottle caps Glass Water Bottles Pack of 6 are made from 201-grade stainless steel with a food-grade silicone O-ring that provides the airtight, leakproof seal. The borosilicate bottle caps Borosilicate Glass Bottles Pack of 6 are leakproof stainless steel lids. Neither cap uses plastic in contact with the liquid contents. Stainless steel does not rust under normal use and does not impart a metallic taste to stored beverages.

Yes, glass is the recommended material for storing essential oils because it is chemically inert and will not react with or absorb the oils the way plastic containers can. The Brieftons soda lime bottles Glass Water Bottles Pack of 6 are listed by the brand as compatible with essential oil storage. The stainless steel cap also does not react with essential oils. For long-term essential oil storage, keep bottles out of direct sunlight, as UV light degrades many oils over time — the clear glass does not filter UV, so a dark cupboard or pantry is preferable.