drinkMe/drinkMe/Shared/CartItem.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace drinkMe.Shared
{
	public class CartItem
	{
		public int Id { get; set; }
		public int Quantity { get; set; } = 1;
	}
}