Amber Boston Round Sirup Glass Bottle, Bakelite Black Cap, 250 ml

The set consists of a brown glass bottle, Boston round with a nominal volume of 250 ml and a black low plastic cap with the same thread type. It is a ready-made pair that requires no assembly or fitting. The bottle and cap are matched and, once filled, simply screw on.

Brown glass limits light exposure to the contents, making the set ideal for fills that are sensitive to light: vegetable and massage oils, oil blends with essential oils, tinctures and alcohol extracts, hydrolates and facial tonics. The 250 ml volume corresponds to a larger home or artisan packaging, such as a body oil, an oil concentrate before dilution, or a hydrolate stock for decanting into smaller containers. The low cap gives the bottle a simple, closed appearance and suits contents that are poured rather than dispensed drop by drop.

What the set offers

• Light protection – brown glass limits light penetration into the contents, slowing yellowing and loss of fragrance in oils and essential oil components.
• Glass with no interaction with the contents – glass does not react with essential oils, alcohol, or most solvents that could soften or cloud a plastic container. It is therefore a safe choice for concentrated oil and alcohol fills.
• Boston shape – a bottle with a round body and rounded shoulder that fits comfortably in the hand, stands stably, and provides a straight cylindrical surface for a label.
• Low cap – a closure without protrusions that opens and closes easily and does not add to the bottle height. Suited for contents that are poured or decanted into another container.
• Reuse – the glass bottle can be used again after thorough washing and drying. We recommend checking the cap and replacing it when changing the contents.

Nominal and total volume

Two volume values are stated for every container and it is worth not confusing them. The nominal volume is the quantity for which the bottle is designed under standard filling. The total volume to the brim is the physical volume up to the neck and is always larger. The difference between them is the allowance for the thread and cap, as well as room for the contents to expand with temperature changes — for example when oil filled in a cool room is moved to a warm one. Fill to the nominal volume, not to the brim. An overfilled bottle will overflow or push contents into the thread when the cap is screwed on.

What the set is suitable for

The set is intended for cosmetic and artisan fills that are poured: body and massage oils, hair and beard oils, oil serums in larger sizes, stock bottles of hydrolates and tonics, alcohol tinctures and extracts, or liquid bases before further processing. It is also suitable for essential oil blends or perfume concentrates in an oil carrier.

Less suitable for fills that are dispensed drop by drop or sprayed. For those, use closures with a dropper or spray pump on the same neck type. Thick creams and butters are difficult to extract from the narrow neck of the Boston bottle; a jar or pot is a better choice there.

Good to know

Certifications in this set. A declaration of suitability for direct food contact and for contact with cosmetic products is available separately for the black cap. For the glass bottle, no such declaration is available, so the set as a whole is not listed as approved for food use, and suitability for cosmetics applies to the cap. The set is intended for cosmetic and artisan use. For food purposes, we recommend choosing packaging where all components carry a certificate.

Preparation before first use. We recommend washing both the new bottle and cap with warm water and a small amount of detergent, rinsing, disinfecting with isopropyl alcohol or ethanol, and leaving them to dry completely upside down. Residual water in an oil fill is the most common cause of cloudiness and microbial spoilage.

Glass and heat. Do not expose the glass bottle to sudden temperature changes. Hot contents in a cold bottle, or cold water on heated glass, can cause cracking. Heat gradually, ideally in a water bath together with the contents.

Cap and seal. The plastic cap is hand-tightened without force. Over-tightening does not improve the seal and is more likely to damage the thread. For alcohol and essential oil fills, we recommend filling one bottle as a trial before a larger batch, placing it on its side, and checking the seal and condition of the cap with the specific formulation after a few days.

Labelling. The cylindrical part of the bottle is straight and smooth; labels adhere well to it. For oil fills, use grease-resistant labels, otherwise the print will smear on first contact with oil.

Other closures. The bottle accepts closures with the same neck type as stated in the specifications. Ready-made bottle and closure combinations are available in the Handymade range.

Recycling. After washing, the glass bottle goes into glass collection; the plastic cap is unscrewed and sorted separately as plastic.

Frequently asked questions