Flasks that are made to look like cartridges by Jack Pyke are available at the Military 1st online store... "The Jack Pyke Cartridge Flasks are in stock now at Military 1st. Made of sturdy 18-8 stainless steel, with vacuum-insulated walls and press button pourer, keep your favourite beverage hot for hours when out and about. 

These insulated flasks are perfect for shooting enthusiasts.

Find out more at Military 1st online store.

• The UK customers: https://mil1.st/JFLACAR73GUK
• The rest of the world: https://mil1.st/JFLACAR73GUS

Enjoy free UK delivery and returns, free shipping to the U.S., Ireland, and Australia, and excellent rates for delivery across Europe."