Add a sticky add-to-cart bar that adapts to variants
Test ideaProduct page · 2026-03-10
Idea byDave DiederenSyntra Labs
Commentary byLiftArchiveOur analysis, not theirsSingle-SKU products fire add-to-cart straight from the sticky bar; products with variants scroll back to the selector or show size/color selectors inside the bar to avoid errors.
Who ran it
Dave Diederen (@DaveDiederen) shared this idea on X. The numbers and screenshots are theirs.
View the original post on X
Similar tests
A
→B
+$38,846 per month
Added rating under title, moved discount badge by ATC, sticky ATC, clickable thumbnails
Product pageReviews & star ratings
@oliverkenyon
@oliverkenyonA
→B
+12.9% revenue per visitor
Redesigned size selector to separate men's and women's sizes
Product pageVariant, size & option selectors@oliverkenyon
@oliverkenyonA
→B
+3.79% revenue per visitor
Replaced variant dropdowns with visual selector blocks
Product pageVariant, size & option selectors@DaveDiederen
@DaveDiederenA
→B
+11.32% revenue per visitor (+A$52,743/month)
Added new sections underneath the add-to-cart button on the product page
Product pageVariant, size & option selectors@DaveDiederen
@DaveDiederenA
→B
+$32,565/month revenue
Added a sticky add-to-cart bar (scrolls to top when variants or bundles must be picked)
Product pageBundles & quantity breaks@DaveDiederen
@DaveDiederenA
→B
+17.39% revenue per visitor
Added a sticky add-to-cart bar that scrolls back to the main buy box
Product pageSticky add-to-cart bars@DaveDiederen
@DaveDiederen