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Pipette Sizes for Boston and Euro Bottles

June 17, 2025
Posted by Dev360

17 Jun

pipette sizing blog featured. dropper bottles - amber bottle and cobalt blue bottle with properly size dropper pipette.

The last thing a customer wants is wasted product. That’s why it’s important to ensure your pipette is the correct length for your bottles, whether it’s housing essential oils, skincare serums, or medications. A properly sized pipette will reach near the bottom of the bottle, but will not touch it. This allows customer’s to get as much product as possible, minimizing waste while doing so.

The guide below shows the optimal pipette length for Boston Round bottles and Euro bottles.

boston round pipette bottle measurements (1)

More About Boston Round Bottles

Popular choice for liquid packaging due to their classic shape and closure compatibility
Typically paired with straight-tip glass pipettes for easy, precise dispensing
Commonly sized in imperial measurements: 0.5 oz, 1 oz, 2 oz, etc.
Common neck finishes: 18-400, 20-400, and 22-400
Each bottle size requires a matching dropper assembly for secure, leak-free use

More About Euro Bottles

Often use pipettes with bent or ball tips for improved control, especially with thick or potent liquids
Sizes based on metric system: 5 ml, 10 ml, 30 ml, etc.
Standard neck: 18mm DIN finish designed for Euro-style caps
Typically used with dropper inserts and tamper-evident caps
Pipettes must be designed to accommodate or replace inserts for proper fit and function

Pipette Markings

Clear, legible markings help ensure users draw the right amount every time. Depending on the material and style of the pipette, markings may be embossed, printed, or laser-etched—each offering different levels of visibility and durability.

Laser-Etched Glass: These markings are burned into the glass so they remain permanent. They’re super precise and great for things that need to be measured exactly, like in science or medicine.
Embossed Plastic (PP): These markings are raised up from the surface so they won’t rub off easily. They’re great for everyday products like cosmetics and medicine bottles. Just keep in mind—they can be tough to see in darker places.
Printed Lines on Glass: These are easy to read and helpful for measuring things accurately, which is why you often see them on skincare bottles or in labs. A lead-free amber ink is used to meet FDA safety guidelines. It’s printed on pipettes and heat-treated so it bonds to the surface and stays clear through regular use.

Choosing the Right Pipette for Your Dropper

The very first thing to check is that your dropper’s pipette is the right length for your bottle. If it’s too short, it won’t be able to reach all the liquid. If it’s too long, it may bend or not seal properly. Getting the right fit helps make sure your product is used efficiently and keeps waste at a minimum.

Once you figured out your pipette’s length, consider markings to help users measure and dispense their products with precision. This is especially useful for serums and tinctures.

Get Your Dropper Caps

Victorie Packaging has a wide array of dropper cap and pipette options to match a range of preferences. Reach out today and we can help you find the exact dropper cap and dropper bottle you’re looking for.