diff --git a/src/main/java/com/booleanuk/core/Basket.java b/src/main/java/com/booleanuk/core/Basket.java
index df7a20aa..84750386 100644
--- a/src/main/java/com/booleanuk/core/Basket.java
+++ b/src/main/java/com/booleanuk/core/Basket.java
@@ -1,5 +1,41 @@
 package com.booleanuk.core;
 
+import java.util.ArrayList;
+
 public class Basket {
 
+    ArrayList<String> basket;
+    int maxCapBasket;
+
+    public Basket() {
+        this.basket = new ArrayList<>();
+        this.maxCapBasket = 6;
+    }
+
+    public boolean add(String product) {
+        if (checkBasket() >= maxCapBasket) {
+            return false;
+        }
+        basket.add(product);
+        return basket.contains(product);
+    }
+
+    public boolean remove(String product) {
+        basket.remove(product);
+        return basket.contains(product);
+    }
+
+    public boolean changeCapBasket(int currentCapBasket, int newCapBasket) {
+        if (currentCapBasket == 0) {
+            this.maxCapBasket = newCapBasket;
+            return true;
+        }
+        else {
+            return false;
+        }
+    }
+
+    public int checkBasket() {
+        return basket.size();
+    }
 }
diff --git a/src/main/java/com/booleanuk/core/design-domain.md b/src/main/java/com/booleanuk/core/design-domain.md
new file mode 100644
index 00000000..64e21c8d
--- /dev/null
+++ b/src/main/java/com/booleanuk/core/design-domain.md
@@ -0,0 +1,13 @@
+| Classes  | Variables                                | Methods                              | Scenario                       | Outcome          |
+|----------|------------------------------------------|--------------------------------------|--------------------------------|------------------|
+| `Basket` | `ArrayList<String> products`             | `add (String)`                       | Product will be added          | true             |
+|          |                                          |                                      | Product will not be added      | false            |
+|          |                                          |                                      | If the basket is full          | Error            |
+|          |                                          | `remove (String)`                    | Product will be removed        | true             |
+|          |                                          |                                      | Product will not be removed    | false            |
+|          |                                          |                                      | If a product does not exist    | Error            |
+|          |                                          | `checkBasket()`                      | If basket has products         | Amount of bagels |
+|          |                                          |                                      | If basket is full              | return 0         |
+|          | `int maxCapBasket, int currentCapBasket` | `changeCapBasket (int newCapBasket)` | If newCapBasket is more than 0 | true             |
+|          |                                          |                                      | If newCapBasket is less than 1 | false            |
+|          |                                          |                                      |                                |                  |
diff --git a/src/test/java/com/booleanuk/core/BasketTest.java b/src/test/java/com/booleanuk/core/BasketTest.java
index e35771b3..da3eacc5 100644
--- a/src/test/java/com/booleanuk/core/BasketTest.java
+++ b/src/test/java/com/booleanuk/core/BasketTest.java
@@ -5,4 +5,51 @@
 
 class BasketTest {
 
+    @Test
+    public void addBagelTest() {
+        Basket basket = new Basket();
+        Assertions.assertTrue(basket.add("Plane"));
+    }
+
+    @Test
+    public void removeBagelTest() {
+        Basket basket = new Basket();
+        basket.add("Sesame");
+        Assertions.assertFalse(basket.remove("Nutella"));
+    }
+
+    @Test
+    public void changeCapBasketTest() {
+        Basket basket = new Basket();
+        Assertions.assertTrue(basket.changeCapBasket(0, 6));
+        Assertions.assertFalse(basket.changeCapBasket(1, 1));
+    }
+
+    @Test
+    public void checkBasketTest() {
+        Basket basket = new Basket();
+        Assertions.assertEquals(0, basket.checkBasket());
+        for (int i = 0; i < 7; i++) {
+            basket.add("Sesame");
+        }
+        Assertions.assertEquals(6, basket.checkBasket());
+    }
+
+    // Try remove bagel that does not exist
+    @Test
+    public void tryRemoveBagelThatDoesNotExistTest() {
+        Basket basket = new Basket();
+        basket.add("Plane");
+        basket.add("Sesame");
+        Assertions.assertFalse(basket.remove("Nutella"));
+    }
+
+    @Test
+    public void basketIsFullTest() {
+        Basket basket = new Basket();
+        for (int i = 0; i < 7; i++) {
+            basket.add("Sesame");
+        }
+        Assertions.assertFalse(basket.add("Plane"));
+    }
 }