The ornamental design for an extendablecup with lid, as shown and described.
1. Extendable cup with lid
1.1 : Front
1.2 : Back
1.3 : Left
1.4 : Right
1.5 : Top
1.6 : Bottom
1.7 : Perspective
1.8 : Front view 1 of state of use
1.9 : Front view 2 of state of use
This design is an extendable cup shown in reproductions 1.1 to 1.9; reproductions 1.1 to 1.7 show the cup in a fully expanded state, while reproductions 1.8 and 1.9 show the cup in two changing states, in particular: reproduction 1.8 shows the cup in a partially compressed state, and reproduction 1.9 shows the cup in a completely compressed state.