This can hold 38 litres, so you have space for the essentials. Four wheels let you roll it standing up and you get several storage compartments for all your knick-knacks.
From Amazon
Xiaomi Polycarbonat 20" Blue
ShopBetter24
Medium suitcase Xiaomi Classic 20" 20" 38L Blue
Shopaide
Medium suitcase Xiaomi Classic 20" 20" 38L Blue