# What is a build-a-box subscription?

> Source: https://zubs.app/glossary/build-a-box
> Title: What Is a Build-a-Box Subscription? — Zubs
> Author: Alexander Kohout (https://zubs.app/authors/alexander-kohout)
> Published: 2026-10-02
> Updated: 2026-10-07
> Language: en

## Short answer

A build-a-box subscription is a subscription where the customer subscribes to a box and chooses what goes inside it, from a menu the merchant curates, for every delivery. The box sets the price or the number of items; the contents change from order to order.

## How does build-a-box work?

The customer subscribes to the box, not to individual products. Before each order they pick items until the box is full, or worth enough to ship. The merchant sets the rules: how many items are included, which products are on the menu and when the menu changes.

**Example (made up):** a meal-kit shop sells a weekly box with 5 meals and offers 12 dishes each week. A subscriber picks 5 before the edit deadline. If they don't, the shop fills the box with default dishes or skips the week, depending on its setup.

## Why does build-a-box matter for subscriptions?

Choice keeps subscribers engaged. A box that changes every time gives customers a reason to open the portal, and a reason not to cancel when they get tired of one product. For the merchant it adds work: menus, deadlines, empty boxes and stock planning all need rules.

So pick it when choice is the reason customers subscribe. If they mostly want the same thing to arrive on time, a fixed box is simpler for them and for you.

## How does Zubs handle build-a-box?

In Zubs the box is a normal Shopify product, and the menu comes from Shopify collections, with rotating menus if you want them. Customers fill their first box on the product page and every later one in the customer portal, and boxes nobody filled are completed with default items or skipped. Everything in detail: [build-a-box subscriptions in Zubs](https://zubs.app/features/build-a-box).

## Bottom line

Build-a-box means the subscription is for the box, and the customer chooses its contents each time. It needs clear rules for size, menu and deadlines, which Zubs handles with Shopify products and collections rather than custom code.

## Frequently asked questions

### What's the difference between build-a-box and a curated box?

In a curated box the merchant chooses the contents. In build-a-box the customer does.

### What happens if a customer doesn't choose?

In Zubs, the box can be filled with default items before it bills, or skipped instead of charged.

### Can customers add more than the box includes?

Yes, as paid extras, if you offer them.

### Which businesses use build-a-box?

Meal kits, snack and beauty boxes, farm boxes and other shops whose customers want a say in what arrives.

## Related

- [Feature: build-a-box subscriptions](https://zubs.app/features/build-a-box)
- [Glossary: cutoff date](https://zubs.app/glossary/cutoff-date)
- [Glossary: skip rate](https://zubs.app/glossary/skip-rate)
- [Help center: set up build-a-box subscriptions](https://help.zubs.app/docs/subscription-management/build-a-box/)