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Sweet Mugs

UX/UI Case Study

Sweet Mugs app screens

Role

UX/UI Designer

Timeline

2025

Tools

Figma, Maze

Team

Individual project

Project Overview

The Product — Sweet Mugs is an e-commerce mobile app that helps users easily search, browse, and explore product details to make informed and optionally sustainable shopping decisions. It offers an intuitive interface, smart search, and interactive elements like rewards, badges, and eco-scores to enhance engagement and promote mindful purchases.

Purpose — The Sweet Mugs app helps users quickly find, choose, and order hand-made and sustainable items.

The Goal — Design the Sweet Mugs app from conception to delivery, focusing on a seamless shopping experience, sustainable product discovery, and engaging gamification features.

Sweet Mugs home storefront

Design Process

01

Empathize

Understand shopper motivations

  • User story
  • Inspiration
  • Pain points
02

Define

Pin down the core problem

  • Needs & expectations
  • Deep analysis
  • Scope
03

Ideate

Explore concepts and direction

  • Mood board
  • Design principles
  • Concepts
04

Prototype

Give the ideas form

  • Low-fi wireframes
  • Design system
  • Hi-fi screens
05

Test

Validate and refine

  • Usability testing
  • Maze
  • Iteration

Design Timeline

A two-week sprint — research and definition in week one, design, refinement and handoff in week two.

1

Week 1

Research & definition

Understanding the user

Focus on the main points in the user story

Search for inspiration

Mood boards and competitor analysis

Define Needs & Expectations

Deep analysis of the user story

2

Week 2

Design, refinement & handoff

Starting the design

Core values, values' impact on users, iteration

Refining the design

Mockups, design system, hi-fi prototypes, accessibility

Going forward

Takeaways and next steps

Mood Board

The mood board for Sweet Mugs draws from warm, cozy aesthetics and a soft pastel palette — handcrafted textures, ceramic mugs, and cozy home settings. Pastel tones like blush pink, lavender, mint, and soft beige create a calm, inviting atmosphere. Combined with playful patterns and natural elements like wood and clay, the overall look evokes comfort, creativity, and artisanal charm.

WarmCozyPastelHandcraftedCeramicArtisanalNatural

Competitive Analysis

A range of ceramic and mug e-commerce experiences — plus inspirational Instagram accounts — were studied to understand conventions, strengths, and gaps in navigation, filtering and sorting, product-detail layouts, promotional patterns, and wishlist interactions.

WestwingEtsyDrippypotsPottery for the PlanetMotel a MiioH&MYourSurprise

User Story

“As an online shopper, I want to navigate an e-commerce application easily, search for products, and view their details so that I can make informed (and optionally sustainable) purchasing decisions. In addition, I want the app to have an interactive and engaging experience that includes gamification to incentivise me to engage with the platform.”

User Needs & Expectations

1

Navigate the app easily

2

Browse and filter mugs by category, price, color, material, and sustainability

3

Clear product information

4

View detailed information about the products

5

An interactive and engaging user experience

Color Palette

Primary

Lilac

#D6D3F6

Secondary

Mint

#D3F6E8

Tertiary

Pink

#F6D3E1

Design Principles

01

Be personal

It is a conversation with a friend, not a transaction with a brand.

02

Be playful

We believe shopping should feel like a small adventure.

03

Be transparent

We want people to trust what they buy and who they are buying from.

04

Be consistent

The interface is calm and predictable.

05

Be aesthetically pleasing

Our mugs are works of art, and the interface should be too.

Low-fi Wireframes

Grayscale low-fidelity wireframes established layout and flow before visual design — focusing on the home storefront and the filter panel.

Home wireframe
Home
Filter wireframe
Filter

Hi-fi Prototypes

Home screen
Home
Filter screen
Filter
Product screen
Product
Checkout screen
Checkout

Usability Testing

Scenario — Shopping for a Unique Gift. You're browsing for something special to treat yourself, or as a surprise gift for someone you care about. You love items that feel personal, handmade, and meaningful. Imagine you're using a new online shop that sells beautiful hand-crafted ceramic mugs — you want to buy two mugs that catch your eye.

100%

task completion rate

7

participants on Maze

Task U1 U2 U3 U4 U5 U6 U7
1 Explore and check out the Blue Mug
2 Add to Cart & Review
3 Filter and find the Green Mug “Forest”
4 Add the Green Mug “Forest” and apply the promo code
5 Complete the checkout
Completion 100%100%100%100%100%100%100%

Usability testing was conducted with 7 participants on Maze, combining live and unmoderated sessions. Feedback from the story-driven tasks helped refine the wireframes while staying true to the original design.

Before / After Iteration

Usability testing drove a focused round of refinements to the home screen — surfacing a search icon and the promo code, and sharpening typography, layout, and visual hierarchy.

Home screen before iteration Before
Home screen after iteration After
1

Added a search icon at the top

2

Surfaced the promo code on the home page

3

Refined typography and spacing

4

Improved layout and alignment

5

Style and visual changes

6

Strengthened visual hierarchy (incl. a price-range slider)

Conclusion

Usability testing revealed the need for a top-right search icon, clearer filters, and a price-range slider. Users called the interface “clean” and “elegant,” aligning with the goal of a personal and visually appealing app.

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