This is a product with an option of pack size. The 6 pack option is larger, so has an additional cost.
The "Single Glass" option currently has no stock available, so is clearly marked as sold out and can't be purchased at this time, however as the "back in stock alert" feature is enabled, customers can register their email address to be notified when it becomes available again.
Photo credit: Nathan Dumlao, Tyler Nix, via Unsplash
The great majority of consumers have difficulties or hesitations purchasing an item with no reviews.
This is a guest review. Research shows that almost all shoppers say reviews influence their buying decisions.
This is a verified review - this means the website has checked that the reviewer has actually purchased this item. Browsing customers are much more likely to buy when they read verified purchase reviews over anonymous reviews.
Displaying reviews can increase conversion rates by 270%
Customers tend to trust reviews more when they see a mix of good and bad reviews - negative reviews can give depth and insight into a product.