Stiga offers this lawn mower that can hold 40 litres of grass in its collection box.
From ManoMano
Combi 340C Electric Push Four-Wheeled Rotary Mower 15″ 294380068/ST1 - Stiga
Conrad Electronic
STIGA COMBI 340c Mains Lawn mower 1600 W Cutting width (max.) 38 cm Suitable for Lawns up to 600 m²