At risk of sounding like a conspiracy theorist,,,,, I reckon the manufacturers do it on purpose.
I've bought two sets of thermal binoculars (just on 12 months apart) and both of them are in padded bags that are as slippery as detergent coated glass.

Die Judicii wrote:How many of you blokes have noticed how fragile items (many and varied) that you purchase are either very smooth and slippery (mobile phones being a classic example),,,,,,,,,, or, are in a bag/container that is also very easily dropped or slip out of your grasp.
At risk of sounding like a conspiracy theorist,,,,, I reckon the manufacturers do it on purpose.
I've bought two sets of thermal binoculars (just on 12 months apart) and both of them are in padded bags that are as slippery as detergent coated glass.