Stretch Pump Plug 'B'

An inflatable plug moulded from thick, smooth red latex with an attached hand pump. Insert it deflated, then pump to expand - it'll grow to double its starting volume. Or if you're feeling confident, inflate it first and work your way in.

There's no rigid core, so the plug stays flexible even when fully inflated, letting it squeeze into place and adapt as you pump. The quick-release valve gives you control over deflation - fast when you need it, or gradual if you'd rather take your time.

Measurements given are for the minimum inflation needed to fill the plug before the latex starts stretching.