Here are 2 water bottles with the 'bootcamp' theme that Sonic Forces created. They're both metal bottles with heat-melted-on tough white coating for the exterior. That's probably why they're so costly, at about 22 dollars per bottle.
The first is the "Special Operations Unit" classic Sonic oval symbol/patch shape, and the second has the "Born to run since 91" slogan that ends with a classic Sonic face. They're both in army-green 'stencil' type format. These can only be bought in the SegaShop online. They are a 2018 item.

This is another thing that feels too generic. It's OBVIOUS that this is some easy to make generic Chinese bottle that can be "stamped with anything you want". It even looks like something from some company picnic where they're just slapping logos or slogans onto anything. The difference here is that the SegaShop holds a real, Sega approved license to Sonic imagry...but it almost feels fake with how plain and obvious these are.*
*SonicGear is not here to just lavish praise onto anything Sonic. If you need a bottle and these fit the bill, that's fantastic...but maybe it could have been a little better.