In case you are not using plans, you can describe items once in Cashier Register's service provider and then leverage it for some neat usage:
use RenokiCo\CashierRegister\Saas;
Saas::item('Elephant Sticker', 'elephant-sticker')
->price(5, 'EUR');
Then later be able to retrieve it:
use RenokiCo\CashierRegister\Saas;
$item = Saas::getItem('elephant-sticker');
$item->getPrice(); // 5
$item->getCurrency(); // 'EUR'
Each item can have sub-items too:
use RenokiCo\CashierRegister\Saas;
Saas::item('Sticker Pack', 'sticker-pack')
->price(20, 'EUR')
->subitems([
Saas::item('Elephant Sticker', 'elephant-sticker')->price(5, 'EUR'),
Saas::item('Zebra Sticker', 'zebra-sticker')->price(10, 'EUR'),
]);
$item = Saas::getItem('sticker-pack');
foreach ($item->getSubitems() as $item) {
$item->getName(); // Elephant Sticker, Zebra Sticker, etc...
}