The PackVue Guide

Everything you need to know about packaging specs, materials, and sourcing — written for buyers, not engineers.

Different Bottle Shapes and Their Uses

Boston Round, Winchester, Bullet, Cylinder — understand when to use each shape and why it matters for your product.

Decode the two-number system used for neck finishes and closures. Never order a mismatched cap again.

Choose the right liner for your product — from moisture barriers to tamper evidence.

A practical guide to plastic and glass packaging materials — compatibility, clarity, chemical resistance, and cost.

When are CR caps required? What types are available? How do you test for compliance?

Vessel types, sizes, materials, and MOQs for wholesale candle jars: the hub for our full candle packaging guide.

When UV protection actually matters for a fragranced candle, and when amber is just an aesthetic upcharge.

How 4, 6, 8, 9, and 16 oz jars translate to actual wax fill weight once headspace and wick are accounted for.

Why almost every wholesale candle jar is a straight-sided tumbler, and where paragon and Boston round fit in.

Lids are sold separately from the jar more often than buyers expect. How to match one by finish size.

Price per unit is the easy part. Stock status, case quantities, and quantity breaks are where orders go sideways.