A sandwich, like a wallet, safely contains its precious contents, fits comfortably into a back pocket, and is rarely found by the police once it's been stolen. Consume a valuable possession with today's Groupon: for $5, you get a sandwich lunch combo, including your choice of a sandwich, chips, a side, and a drink, at The Hydrostone Café (up to a $13 value).

The lunch artisans at The Hydrostone Café assemble an array of savoury sandwiches served alongside homemade soups and pastas. Sandwich fillings span the light-to-heavy spectrum, from beef brisket ($7.25) to tuna or veggie ($5). While hands busy themselves with sandwiches, forks and spoons pierce, scoop, and sculpt busts of Queen Victoria from sides such as creamy pasta, coleslaw, or chili ($2.50 for a small, $5 for a large). Homemade soups ($2.50 for a small, $5 for a large) pair with half sandwiches, and the kitchen can tag out any regular bread for a gluten-free version ($1 extra). Patrons can spelunk in the endless caverns of the Internet by using the eatery's free WiFi while sipping coffee, tea, or pop ($1.50–$2.50) or can take their meals to go for enjoying while safely ensconced in their underwater domes.