Two variant selectors do not work (Volume bundle creation)

Shopify Discussion
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Topic summary

A developer is attempting to implement a volume bundle feature that adds multiple product variants to the cart simultaneously with discounted pricing.

Current Issue:

  • Two variant selectors are displayed, but changing one selector causes the “Add to Cart” button to show “Unavailable”
  • When both selectors remain identical, only one variant gets added instead of two
  • The developer has shared a screenshot showing the dual variant selector interface

Resources Provided:

  • Live URL to the product page (Glow Curtain LED lights)
  • Code shared via Codeshare link for review

Response:
A community member indicated this functionality cannot be achieved using Shopify’s standard form structure. They suggested that implementing this feature requires a fully customized page built with custom code, recommending the developer hire someone for the customization work.

Status: The issue remains unresolved, with the suggested solution being custom development rather than a configuration fix.

Summarized with AI on November 1. AI used: claude-sonnet-4-5-20250929.
1

Hello, I’m trying to code a volume bundle. I currently got almost everything working apart from adding multiple products to the cart at the same time.

Schermafbeelding 2025-01-08 172619.png
Schermafbeelding 2025-01-08 172619.png1919×1079 338 KB

So I got these two variant selectors on top of each other now, but when I change the input of a variant selector the Add to Cart button becomes ‘Unavailable’. When I keep the variant selectors the same, only one variant is added to cart instead of two. Can someone please help me with making the logic to add multiple variants (with a discounted price) to cart. Kind regards, Stef

2

URL: Glow Curtain: 400 LED Lights for a Magical Ambiance – InteriorGlows
Code: Jan 08 5:40 PM - Codeshare

3

Hi @TrendBlend ,

You can’t achieve this with Shopify’s current form structure, as it would require a fully customized page, which is only possible with custom code.

I recommend hiring someone to handle this customization. Let me know if you’re willing to proceed, and I can guide you further.