No - Tip Block from Chicago Textile:

Up, down and all . . . square. No-Tip Blocks and Tall Blocks are the ultimate in versatility. Their unique design and construction distribute weight evenly, making the No-Tip Block and Tall Block sturdy and stable. Mix and match colors and heights for fun alternatives to typical seating, tables, room dividers and decorative pieces. The new Tall Blocks are ideal for counter or bar seating. The No-Tip Block and Tall Block come in a wide array of fabric options making them the perfect fit to any décor.

Chicago Textile Bio:

If you want options than look no further. Chicago Textile products from Exclusively Home offer a multitude of color, fabric and pattern options for almost all of their products. Chicago Textile, otherwise known as CTC, is the innovator of Puff Chairs and Ottomans, Renaissance Furniture, Opus Tables, Matrix Storage and Axis Furniture. Spruce up your bedroom by choosing any of CTC's fantastic fabric options and make a headboard out of it. It is that easy.