The Build a box template creates a popup where customers fill a box with products of their choice — and unlock rewards like discounts, free shipping, or free gifts as they add more. Great for snack boxes, samplers, drink packs, and any mix & match bundle.
When to use it
Use this template when you want customers to pick their own combination of products from a curated set — with an incentive to fill the box. It replaces hand-building the slots cart, progress bar, and tiered promotions block by block.
How to apply the template
Open a checkout link and toggle Popup on
Click Edit to open the block editor
Click the templates icon in the editor header and pick Build a box
Walk through the four steps below
Review the summary and click Apply
The four setup steps
1. Which products?
Pick the products customers can choose from — either specific products or a whole collection.
2. How many slots?
The maximum number of items the box can hold, from 1 to 20. Each slot holds one item.
3. Must they fill the whole box?
Choose Fill any amount to let customers check out once they've added at least one item, or Require a full box to keep checkout disabled until every slot is filled.
4. Reward tiers
Each slot count gets its own optional reward. Click Edit on a tier to give it a discount (percentage or fixed amount), free shipping, a free gift, or any combination. Leave tiers empty for no reward at that level.
Rewards behave like a ladder: discounts upgrade as customers reach higher tiers (a 15% tier followed by a 20% tier gives 20%, not 35%), free gifts stack (each reached tier's gift is added to the cart), and free shipping stays on once its tier is reached.
What the template builds
Applying the template replaces the current blocks with a ready-to-use box builder:
Header — your store branding
Callout — a green highlight saying "Build your box — up to N items"
Progress bar — fills as items are added, showing the next reward (only added when you set at least one reward)
Cart items — displayed as slots, so customers see exactly how much space is left
Products — the products or collection you selected, kept visible after adding
Cart summary — subtotal and total
Checkout button — to complete the order
The reward tiers are written to the link's Promotions, so they apply at checkout — not just visually in the popup.
Tips
Every block stays fully editable after applying — tweak the callout wording, colors, or add more blocks.
You can adjust the reward tiers later in the link's Promotions section.
There's a shortcut on the dashboard: the mix & match bundles card opens a new link with this template pre-selected.