Instacart works with several retailers throughout the United States. Some of your available options may include places like CVS, Walmart, or Target. The selection of blood pressure monitors will vary by store, just like if you were going in person to shop. The most accurate way to tell what is offered is to check the Instacart app to see which stores are available within your area and the different blood pressure monitors they have in stock.  Set up an account with Instacart by providing some basic information including your email and address. Once you have an account with Instacart, you can check to see the participating retailers in your area and search each store to understand availability and decide on the right blood pressure monitor. Add your choice to your cart and have your order delivered the same day.