The best cactus gifts tend to outlast their recipients, and this one is engineered to do just that — a hand-blown glass barrel cactus, ribbed and dotted with fine painted spines, that asks nothing and outlives everything else on the windowsill. You will notice the spines are suggested rather than crowded; a real barrel's needles read as restraint from a distance, and overpainting them turns the whole plant into a pincushion. A small painted bloom sits just off-center at the crown, the one flourish it allows itself. Octavia, a neighbor whose sunny windowsill is a quiet graveyard of good intentions in terracotta, would treasure a green thing she could not possibly kill. The Royal Ontario Museum studies desert flora behind the glass of its dioramas because a plant built entirely around going without water is one of the clearest arguments nature has ever made for doing far more with far less, and a cactus makes that same case on a branch.