
Why Do Cats Knock Things Off Tables? The Real Answer
It isn't spite, and it isn't your cat testing gravity. Four things drive the pawing-off behaviour, and three of them are fixable in a week.
6 min read
The best seat in the house costs no floor space.
Height, warmth and a view, using no floor at all. In a small flat that combination is difficult to provide any other way, which is why window perches get used when floor beds do not.
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Colour: Purple
Why you'll love it
Cats settle better with elevation and sightlines. A window perch delivers both in a flat that has no room for a cat tree.
It gives an indoor cat the warm patch they'd otherwise hunt for on a windowsill full of things to knock off.
Suction cups mean no brackets, no screws and nothing to make good when you leave.
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Elevation matters to cats for two reasons. A raised position gives a wide view of approaches, so nothing can arrive unseen, and it removes the cat from the floor where people and other animals move. That combination lowers stress in a way that a comfortable bed at ground level does not.
A window adds two more things: warmth from sunlight, and something to watch. For an indoor cat, watching birds, weather and the street is genuine environmental enrichment, and a cat with nothing to look at is a cat with a large amount of empty day to fill.
Suction works by air pressure against a perfectly smooth, clean, non-porous surface. Ordinary flat glass is ideal. Textured, frosted, patterned or leaded glass is not, because the surface cannot form a seal, and a cup that appears to hold on textured glass will let go without warning.
Even on good glass, suction weakens over time as air migrates in, and it weakens faster with temperature swings, which a sunny window has every day. Press each cup firmly back down weekly. Clean the glass and the cups with warm water occasionally, since dust and grease under a cup are the usual reason one fails.
Cats are cautious about new furniture that moves, and a hammock does move slightly. Put something that already smells of the cat on it, a favourite blanket or your own worn jumper, and leave it alone rather than lifting the cat onto it. Placing a cat somewhere it has not chosen tends to produce the opposite result.
Choose the window carefully. A sunny one with something happening outside will be used far more than a shaded one facing a wall, and a quiet room beats a busy hallway. If the perch is ignored after a fortnight, moving it to a different window is usually more effective than any amount of encouragement.
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All OK. Second time I've ordered.
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Exactly as the description.
Good questions
On clean, smooth glass they hold well. Wipe both the glass and the cups with rubbing alcohol before fitting, and re-press them every couple of weeks.
No. Suction needs a smooth, non-porous surface, so frosted, textured or leaded glass will not work.
On clean, smooth, flat glass they hold well, but suction weakens over time and with temperature changes. Press each cup down weekly and clean the glass occasionally.
No. Suction needs a smooth non-porous surface to seal against, and a cup on textured glass can appear to hold and then release without warning.
Up to roughly 10 kg, which covers most cats. Mount it low regardless, and test it with something heavier than your cat before letting the cat use it.
Last reviewed August 30, 2026
Advice

It isn't spite, and it isn't your cat testing gravity. Four things drive the pawing-off behaviour, and three of them are fixable in a week.
6 min read