The bar bucket is a great way to carry water, snacks, batteries, coffee mugs, beer etc. Made from VX21 with a foam backing to help the bag keep its shape and provide some insulation. A bungee drawstring at the top helps keep dust and muck out of your food. Other than when bike packing I really like them on my townie for carrying a beverage.
All velcro utilizes Velcro One-Wrap with a loop sewn to the bag for different configurations and mounting options. This is allows more attachment options and is really nice when you are running two buckets because the one wrap will attach to the other side around the stem. Stem velcro is 1.5" and handlebar attachment is 1"