Why You Should Test Samples Before Bulk‑Ordering Eyelash Tubes?

Many beauty brands run into a frustrating issue with custom eyelash packaging: after filling ABS eyelash tubes with lash growth serum, the tubes develop cracks, whitening or leaks over time. This leads to full‑batch waste, extra costs and delayed production timelines.

Most people assume this is a manufacturing defect, but it is often caused by chemical incompatibility between the tube material and your formula. For this reason, we strongly recommend all clients order samples first and run real‑fill tests before placing large custom orders. This simple step helps you avoid costly losses.

Why do standard ABS eyelash tubes crack with lash serums?

Common budget‑friendly eyelash tubes are mostly made of ABS plastic. ABS is cost‑effective, rigid and produces a nice clear finish, so it is widely used for small beauty containers.

However, ABS has one key limitation: it has low resistance to certain chemicals. Lash growth serums often contain plant oils, active ingredients and specialty solvents. When these formulas stay in long‑term contact with ABS, they can damage the plastic structure and cause stress cracking.

This chemical reaction does not happen right away. Cracks and brittleness usually appear days or weeks after filling. If you only discover this after bulk production, the damage is already done.

Sample filling test: your low‑risk risk‑avoidance solution

Testing samples is not an extra formality — it is an essential step for custom beauty packaging.

Every lash serum has its unique formula, with different ingredients, concentrations and pH levels. No single tube material works for all liquid formulations.

Get sample tubes of your chosen style, fill them with your actual serum, seal them and let them sit for observation. If no cracking, whitening, deformation or leaking occurs during testing, the ABS tubes are compatible with your formula and safe for bulk purchase.

If cracks do show up in sample testing, only a small number of samples are lost. You save yourself from expensive full‑batch failure and rework.

Incompatible with ABS? Switch to PETG tubes

If your formula causes ABS tubes to crack, we suggest switching to PETG eyelash tubes.

Compared with ABS, PETG is a high‑performance cosmetic‑grade plastic. It offers much better resistance to solvents and chemical reactions, making it highly stable for lash growth serums and nourishing essences. PETG also features excellent clarity and good toughness against breaking. It prevents formula‑packaging reactions and elevates the premium look of your finished product.

Final tip

Packaging compatibility is critical to your product quality. Testing samples ahead of time is far more efficient and economical than fixing problems after bulk production.

If you have any questions about eyelash tube selection, material compatibility, sample testing or custom orders, feel free to leave us a message. We are here to help you find the right packaging solution.