Quick answer
Pick the Base Cover size that matches your bottle's base diameter, not its height or capacity. If you are between sizes, choose the smaller one only if it stretches fully around the base without bulging.
Why bottle diameter matters more than capacity
Two bottles with the same capacity can have different base widths, so a 500 ml bottle is not automatically a Medium. The cover needs to hug the bottom edge evenly; a loose cover will slip and a tight one can be hard to remove.
The Base Cover is made of silicone, which grips and absorbs minor knocks. That flexibility helps, but it does not make one size fit every bottle.
When the size is not obvious
If your bottle has a tapered or very rounded base, the cover may not sit flat. In that case, check whether the cover stays in place when the bottle is empty and standing on a hard floor. If it rocks or lifts at the edge, it is not the right fit.
The catalog does not list a size chart by bottle model, so use the physical fit test below rather than guessing from the bottle name.
How to fit and check a Base Cover in 4 steps
- Measure the bottle base diameter: Turn the bottle upside down and measure straight across the flat bottom with a ruler. Write down the measurement in millimeters. Do not measure the widest point of the bottle body; use only the flat base that the cover will wrap.
- Match the measurement to the cover size: Compare your measurement with the size options: Small, Medium, or Large. If your measurement falls between two sizes, choose the smaller size only if the silicone can stretch around the base without leaving a gap at the edge. A cover that needs force to stretch on is safer than one that slides off when you lift the bottle.
- Fit the cover dry and empty: Start with a clean, dry bottle and cover. Push the cover over the base evenly, working around the edge with your fingers until it sits flat. A common mistake is fitting the cover while the bottle is wet or full; water or weight can make it harder to seat correctly.
- Test stability and removal: Stand the empty bottle on a flat surface and press gently. The cover should not rock or lift at the edge. Then peel one edge back to check that you can remove it without excessive force. If the cover lifts or twists easily, try the next size up; if it will not peel back, it is too tight.
Product facts
-
Accessories | Base Cover - Light Yellow - Small: Small size in Light Yellow silicone. A small cover is the right starting point for narrower bottle bases, and the silicone helps prevent scratches and slipping.
Accessories | Base Cover - Light Yellow - Small
-
Accessories | Base Cover - Marine - Medium: Medium size in Marine silicone. Medium suits mid-width bases, and the non-slip grip helps keep the bottle stable on flat surfaces.
Accessories | Base Cover - Marine - Medium
-
Accessories | Base Cover - Light Yellow - Large: Large size in Light Yellow silicone. Large is for wider bottle bases, protecting the bottom from drops and scratches without stretching the cover out of shape.
