How do I disable the add to cart button?

Site URL: https://luluthelabel.com/

I am going travelling for two months and won't be able to fulfil orders. How do I disable the add to cart button or essentially, what's the best way to prevent customers from ordering? I do not want to lock or disable my website. 

Add to Design > Custom CSS

/* Hide add to cart button */
div.sqs-add-to-cart-button-wrapper {
    display: none !important;
}