Stop trying to force a round peg into a square hole—or in this case, a bulky cylinder into a slim briefcase. The A6 Stainless Steel memobottle (£55) understands that your laptop, notebook, and documents are flat, so your water source should be too. Sized perfectly to match A6 paper, it slides effortlessly into pockets and bags without creating that unsightly “hydration bulge.”

With a sleek satin powdercoat finish and an innovative internalized thread, the drinking experience is smoother than your best pickup line. Plus, its flask-like aesthetic gives you a rakish air of danger, even if you’re strictly drinking tap water.