Glass changes how a drink tastes, or rather it refuses to change it at all. This Black+Blum travel cup is hand-blown from borosilicate glass, a taste-neutral material that leaves coffee and tea exactly as they were made, and it is both lighter and more durable than the word glass suggests.

The cup holds 340 ml behind a fully leak-proof, lockable lid that opens and closes with one hand, which matters when the other hand is holding a bag or a handlebar. A non-slip protective silicone sleeve shields the glass and gives a secure grip, and the diameter of 7.2 centimetres was chosen to fit standard bike bottle cages and car cup holders. All parts are BPA free and dishwasher safe, and the lid disassembles completely so nothing stays trapped in the seal. It arrives in a gift box, in grey, turquoise or green.

This is the reusable cup for audiences that notice materials: design studios, architecture practices, specialty coffee roasters, cycling and commuting campaigns, and premium client gifting where a steel cup would look ordinary. It also fits office programmes replacing disposable cups, and works well handed over alongside a bag of coffee.

Branding goes onto the silicone sleeve, which keeps the glass clear and places the logo exactly where the cup is held. MerchRepublic arranges the print, quotes bulk tiers and delivers finished orders throughout the EU.