A Lightning invoice works slightly different to your traditional bitcoin address.
All On-Chain bitcoin addresses have no expiration date and the address can be used as many times as you like. While this is not advised, most wallets will generate a new receive address for you automatically.
Lightning invoices on the other hand do expire after a certain date or time and can only be used once.
There are a number of technical reasons why Lightning invoices actually have an expiration time that we won't discuss here.
At Bottlepay, when creating a Lightning invoice, you have 1 hour to make the deposit via Lightning otherwise it will expire.