things I can attach to bottle cage mounts? Apart from bottle cages

[Punkawallah]

A mantis shrimp esque sideways punching glove that automatically detects sub 1.5m passes by cars?

Mr Newton scoffs at your idea, and instead suggests a rocket powered punching glove with an interrupter gear to prevent leg burns when the rocket fires.

 

[Jameshow]

If you have a couple of band on bottle cage fittings, you could attach a great long LWB recumbent bike to them.
View attachment 812885
What then, you might ask? You could get some 10mm aluminium tubing from B & Q, flatten out the ends, and with careful bending round various formers, make a trouser deflector to keep the chain off your trousers (or vice versa!)

View attachment 812884

Looks like a magazine rack to me!

 

[VinSumRox]

Baguettes?

 

[geocycle]

Baguettes?

That’s an excellent idea! My Renault 4 has an optional baguette holder, maybe I’ll buy one and modify it for the bike.

 

[Methersgate]

It ought to be a really good place for a battery…?

 

[Punkawallah]

That’s an excellent idea! My Renault 4 has an optional baguette holder, maybe I’ll buy one and modify it for the bike.

My Peugeot had a wine bottle holder between the rear seats.