Two glasses of something cold, Elizabeth Castle across the bay, the sun going down. This is the point of all of it. The right glass makes a difference, not for snobbish reasons, but because a proper wine glass shape changes how the wine tastes and how the evening feels.

The catch is that real glass on a boat is a hazard. Broken glass in a cockpit or bilge is no joke. The answer is usually shatterproof plastic (Tritan or polycarbonate), but they aren't all equal. The cheap ones look like picnic cups. The good ones are surprisingly convincing.

Sundowners Off St. Aubin's

A settled summer evening anchored off St. Aubin's, with Elizabeth Castle across the bay, is about as good as a sundowner gets. Check the tide before you settle in: at springs the bay dries a long way out.

The Glasses

Flexible Shatterproof Wine Glasses
A good starting point. There's a wide range of flexible, stackable silicone and Tritan wine glasses designed for boats and camping. Look for dishwasher-safe, BPA-free options with good reviews, and check the capacity, as some are smaller than they look.
Typical price: Around £15–20
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Govino Flexible Wine Glass
The best-known boat glass. Shatterproof, with a thumb notch that makes it easier to hold on a moving deck, and stemless, so it's harder to knock over. A popular choice among sailors for exactly those reasons.
Typical price: Around £12 for 4
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Riedel Swirl Stemless
The indulgence pick. Real glass, but the stemless, weighted shape is much harder to knock over than a stemmed glass. For calm anchorages and special evenings only: never under way.
Typical price: Around £35 for 2
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Complete the Sundowner Kit

Add warm, dimmable deck lighting (see Best LED Deck Lights for Boats) and an insulated bottle or wine cooler to keep things cold without ice. The Channel Islands sunset does the rest.