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I’ve been waking up without that familiar ache in my lower back since I started using it—the gentle weight really does hug your body as it heats up. The Terraclay stays warm for a good chunk of the night, which surprised me. Tossed it in the freezer one afternoon after a long run, and it worked just

The Terraclay material holds heat way longer than my old rubber bottle, and the gentle weight pressing against my lower back is oddly comforting. Waking up without that morning ache has been a game-changer, and I've even popped it in the freezer after long walks—works perfectly both ways.

I toss and turn most nights, but this thing stays put and the heat radiates for hours. The Terraclay body warms up evenly and it’s genuinely relaxing to hug after a long day. Only wish the cover came in more colors, but the sleep improvement alone makes it worth it.