Two glass walls with air in between: that's insulation, and it's exactly why this glass works. The heat stays inside instead of leaving through your fingers, so your tea holds its temperature longer and you can pick the glass up without a handle or a coaster.

Between those two walls the Enna holds real dried flowers. So you're looking through something, rather than just at the colour of your drink.

Three hundred millilitres is the measure of an ordinary cup, without the cup. I use it most for teas that have something to show — a blooming tea, a rooibos with pieces in it, an infusion with whole petals.

The Enna comes in two designs. If you have a preference, tell us with your order — we'll take it into account as long as stock allows.

Heat-resistant double-walled glass with dried flowers between the walls. Capacity 0.3 litres. Height 11.5 cm, diameter 7.5 cm. Not dishwasher safe — wash by hand in lukewarm water.

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