Coolant catch tank

With the bottle hidden behind cover might be a waste.

Be good for the guys on the black rockets.

But not so good on the blue beast.
 
Could be excellent . . .What tis it made of and what size???
Almost certainly Ali.

BUT BEWARE - Drinking bottles USUALLY (if they are any good) have a resin (whatever) coating on the inside to stop drinks tasting metallic. This SHOULD be OK - but..........

If you can find a Stainless one it's less likely and if it is designated a FUEL bottle it wont have the anti-metal-taste layer. Visit your local Chinese "GOTITALL".
 
@Steel

The last one brings back memories of when I lived in London for three years.

Worked at Greene King pub in the city.
 

Nice job! You do good work.